1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4ee606e2e4f6bedb346e1cdccdf8892d5dba20e3f7f16e9f065dfc0a0ed06c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad1a5a87-b399-4b18-806d-a46bd606e84d.json and https://artists.proofprofile.net/proofs/artist/ad1a5a87-b399-4b18-806d-a46bd606e84d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5cc93c7cacbe3058fdc2365acfbbf8b63738802fdcb9a14c095388dbd62666. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42230150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea94796b8b5310760f8523d8b5e7dc100363dadcff5074b1a87207abed68188. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42230148.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6235f325bb208af40c3a1b0a32fc631b8e4514182d62e428ae293b705ecabe49. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2462187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8642879333ea8ad3bee4eb1ad1ae36cec2d57cfa135bf5f9d85a75587f8e8387. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2462188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213eeb6a2f88dd89ad0568e4485eb4a00d868b7f083a7162d7791ff88343d43a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42401981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28501614fd73c03f91236654e69ce211db25d8c69d4b8b1d692965fa67c9a6da. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42401983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60df1fca08290af0f1998c4397610a653376c53b58d312a9477fbc1572ded390. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2481377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cdf8108d87b18b372bd641fdf3ad672253a1601e81ecb312672d9e004655fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2481379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef96acba12283be9f43118060bee463d34e11bf0389c80fb1fbcd3027c6b4fb1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2396073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4388e4823a53c686af6dd3f95325fc7dea84f75e4e5b817b0df6070d974b6e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2396074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d7c072d600b1abd25d52960e219f7848f24126f5a6e9377868880d8775336. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2396075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f2fdb1d0e2e6e4710fc4c3e0f1603f0403e4666ea119ce69f5dd8bf034c583. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2396077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8148c4e830d61c651b3cc3f9afac6a3eb0dc9923b0d5d9260e34e2aaa83b7814. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2396081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbca4fc2155efe75d2995977f7cdb8cb47532df482f215b6935e0b839c6d629. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2388791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621076717f94b5af39bbbda80a4b3736ccbddc12d55b3fc5c289116c58a00c7c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2389500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910857654d740ffbeba71dc16333d8bf95bb27853647a21d151c1f09fe92fe00. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2396080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fde96b1f563576d523cc268144fc52d533ec31d6c045f665ecf0ccaa849faf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2401328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc646c2df3457a118bc733970a6ee5f65e595a9ee8a73dafe55d87065328bbb7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2401330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc037ee8a4cc9eaab2922746a7d5c3f666ba11c7868ed0bf0a42313990156ff8f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42466632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30560b2f1dbdc1dcdcc1670788da56ed56127662e1351addc9ac0953f111c7d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42466703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0d25c1a3bfc1e162b81de1cea03beefb57b6206823ea69ea67b31813d13ea7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBIGR2376001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2839d81c914779d48ceb52fdb53b642e8bba53eac44cfdf2a0ec0be0fa6b3aab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEQ2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd981611fae57f0c9e798517aa091d74c95b4db0151281edee9ecbb0e4b90b2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2379675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b19d90e6c051882d5acaa393ff645aa229eebbc126f47f18b48670e60b6c1c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42402993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a628193c0fec2007afa22e49acbb84b838f27c0051d67359c66bcac5c55ccbd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2518292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7ca0f66c5c1c91c3a8b3ab6ddce2099645853ae0e643e22a4132f79c72985e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2510911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129ce8a8855526b1cf1805145f3acde9f3c4a983a5b270b2303308e8472a1eb6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2517151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e90f29aaa5695e7b72ca120982e6ba63ea8157f6e9ab457feda7749958124. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBTMZ2501315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131aa37415d1bfbf386f679966a80be996268cbd9a54add09364dfab68fca592. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2511940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37cb704180582ee9c6ed1c597f5ce29310ae8dfc2ba2d49f3c539e848d57ff4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2511942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5f96200007a061a2bee7bc8ba2427e8701dfd9ee7d3e02e5d1b18b032b943. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2511943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebabc9c0a179e722337a9b44d4ae760d301a829da4acc72a24d38846c90f0055. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2511941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479d65c1cd2381bcf738d7cfb9cfc742fe2aaab393f39bc5a9886509fcc218ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2505653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc393303f4d97546dcf569688791e89765522b33515bbebd32201a160eca20b7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2505654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf586e1dcd84a7364bcb989d077fb505d4911f346dbb326cdd0a51c92e061c38c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2505655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3971bb99d00ce60a094ec2996645fa72a38c799e092a8d5759d0f5eac4810c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2505656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dee262210e98742538580c403385945c18d84623b9edc12279cc3b44ddbe2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2514159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5962d72d5a69f9c2a9058c6b881921694fded58669dbfa87ee3e91346f352c1f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2514160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc884b75aa00ef5f9957c00b228edb42f8511a0ece81b81dd1954ab4e8a1101ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2510373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e3067ecd6e6580ac93450df6dd365c1db24b58d795c1ad4f14e6d0a9ddf2f1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2510368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264332838016ac2443544b6ce394033edcd060aea7cc85a943a0d4228b23dae0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBVPL2400094.