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 0x6a234fb5196b5d7b245d3962f5939cc7fc46f54c542a3b4d8966e75c8a992194. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d9c50d8-5a40-4910-a7f5-3be42a6d0f45.json and https://artists.proofprofile.net/proofs/artist/2d9c50d8-5a40-4910-a7f5-3be42a6d0f45.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 0xb6ae44a3066d82067c091cf3e6b71775ac8ec8606f33a8d625de89063fe3a8c6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6N2059988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c31bbd4aed1021e203455abdc8042da6eb8eb4449ffb8db35b3a7da22de5fe5. 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/QZK6N2059991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b5ece5c3273f4099cbbf0c796b116332b529e79957f1dddf34b1f6d0a9a220. 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/QZK6N2059993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03dae4d6556fe187462f4ed152eae32ab6b4de653ff51c2484c492c6a877508. 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/QZK6N2059996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0778c4612279c509abd8f843b12726e6d2fe81a69be9e96616bf91a0b088fc. 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/QZK6N2059998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e4919d8f98ee26a646aa37a51040166917b22aa6dbd0c815714242c2950a9e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6N2059999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5185a674a0eddc2d4dc7389631033cc11b5f4ea88fe77ad319741414e32fb31a. 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/PL2DY2302686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64714a1c6d901e0e16368317e96703be7196ea66f80085bb67a7d023c1b13ade. 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/PL70D1900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbab09885c108d741a2a92fbb8afbacf714603346e3960343318dca28e151b0c. 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/PLB382400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ef59f9a362c4dfdd0ff3ee9fc92ed0ecb3cba6a8da95d3b3f26b314e5bb655. 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/PL2DY2302389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0e00ab3dececc330c0a223673c475612b4e58ea0bbb7f0a9413bb94e26837d. 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/PLB382400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc60409844d1cec41d645c72489eb3844543f46206d9519c27befcdfc016c85. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLB382400542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f743c3c61fc17396269fbd7d6c8ab5779d8caf2d76b1de8b2987e11542caf79. 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/PLB382300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe568abded7428b84253b70f3f7a12533d1a84a80af99862443e237bec782b0f. 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/PLB382300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900ae323b1625559e92a5640227c567c709576a1ebd9b2da7005d31a0e2b284. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/PLB382300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc53fbd5b5bb5fe2c6d0b4b13c2608fe8044ed8f41de6806948570443aaecb0. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLB382300464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f743c3c61fc17396269fbd7d6c8ab5779d8caf2d76b1de8b2987e11542caf79. 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/PLB382300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe568abded7428b84253b70f3f7a12533d1a84a80af99862443e237bec782b0f. 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/PLB382300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900ae323b1625559e92a5640227c567c709576a1ebd9b2da7005d31a0e2b284. 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/PLB382300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc53fbd5b5bb5fe2c6d0b4b13c2608fe8044ed8f41de6806948570443aaecb0. 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/PLB382300464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f017cf0929491274283ebe7f1e6bfc774ce80566d3c7270900e9400a2b05c9b. 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/PLB382400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56be55a0beedfd4ef849f370759d0d9b8c427b75e93d18b9c32ea6d3a7c7e5d3. 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/PLB382400523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f743c3c61fc17396269fbd7d6c8ab5779d8caf2d76b1de8b2987e11542caf79. 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/PLB382300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe568abded7428b84253b70f3f7a12533d1a84a80af99862443e237bec782b0f. 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/PLB382300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7f70ed1afa304ea034bb5a5278e894bd84324faca604761ae72c62ee702d82. 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/PLB382300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1693036d3f03112c5521ba2a705123319e9c3896b3bd93833329366c4099cd9. 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/PLB382300157.
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