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 0x51048b87072afc5076537b8cc84a91536bb252cfead08fff48bf8838a6195506. 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/a06167d5-5ffc-46e2-afc4-a59dd71550fe.json and https://artists.proofprofile.net/proofs/artist/a06167d5-5ffc-46e2-afc4-a59dd71550fe.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 0x88ea24ed5842eb9cacd808ce38ac5f5fa53495361d0292931a9d0b5e12d02e0d. 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/UKXN22377285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ea24ed5842eb9cacd808ce38ac5f5fa53495361d0292931a9d0b5e12d02e0d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UKXN22377285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c514551830251cafb1fbefd5d7b5a27a18d0a033a9ba2d2eff7561a32a7900. 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/GBMA22306187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa6a7fbbb53c3aa2990dba506afcb3433954e6b3827eb7e589106e3aa26ef1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:11:06Z), 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/GBLFP2406787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd063e82a852c3abc46abd375a2bef8b9b5dc3b65b8141b5c45ab22fedbd390b6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DGA0M2427261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fb6b592a0592d5fdbf01d53c016c9312334d68fbcb2bcd2b1cf9d0a76d63ff. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAII2447267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd063e82a852c3abc46abd375a2bef8b9b5dc3b65b8141b5c45ab22fedbd390b6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DGA0M2427261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8d615b4719443b9108059eb8b34ba3523df955c817e6c8bdf0eeab2b977a67. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:00:28Z), 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/DGA0L2466844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862c1b283a2e4a239061e186888d2a447570385c5ce48dabb67ca0b0eb12465e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA0P2494704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd261e41207f0728bd12734cb7e0edd2dfcc621bb34b00b4550980afcb4886d5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYX2241692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7cf34724f57acdacf3b54b2050c0b22c2c317198f47acaf80f2e68ebcf028b. 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/QZNWS2264257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d67a9463b6e7e3e03bbc0ab4bdace6adb091756fc506e3a915e7585e6ebb279. 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/QZHNB2247639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba9d13e84bc9d19f5e494110356913164cf950cf40842eb650d1e9c749a4710. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ93L1822106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947fec764f2b091b1c4424df7c4ed35fbc42698455f248176ceee2119e84bab3. 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/GB5P52200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70a6b3d5be5280643584eae56ff71d98f74377817f9d60e72635a6e90fb6cc1. 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/GB5P52200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e306e4d5c642f8d8008e2dbf7c0d5a495d2ee46d05ac8c6584b3965a526708. 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/GB5P52200059.