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 0xb92466f451383e8c82b6b3dab58ac3b5fd47b8acad14ee93ed9d913eadedc3c6. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/020fcda9-0cc8-4288-91a7-502629859989.json and https://artists.proofprofile.net/proofs/artist/020fcda9-0cc8-4288-91a7-502629859989.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 0x28d3214b1fd82ebb4325278f2979af38d5b1327c2c2d7fa7e1e9a1654290e748. 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/QZFYW2028632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071af0c0c9ef13975d09da5bd9f5d3ee52fd2c4d6ec2571f388e13d900411d0b. 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/QZWFG2370992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043822f1751ee5421d11c1c9f3e5ee3d783e8fa099fb6b6584ca2b54edc90ea. 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/QM2PV1838869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cba61beb4fc7fe310d494b7f59c8bb39dce667731f91180b6b9c41d1821e4c. 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/QZFZ71986952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200a14f9dda19ee827d8fc46174c039a934099a49cfa3452642fafdf99a14e91. 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/QZDA81950547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbad3c66040a6e6431f39d333e016255a63efe22681bc2a33a67b6175ecbe578. 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/QZ8LD1948412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccc3e89d31fd29a4f3453a34961c5536f1f768450e82b48b29140e723b7fff5. 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/QZFZ71986953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7712cf7cbfdbb7be015b4208e152c74de3cb6f863be1ffcb93f264d916f8b817. 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/QZFYY1979715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4c78a3534ae3eadc4b053636c005459af4e22267fc2104c337bf241c415a25. 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/QZES61924952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245c4f4c84412088c5035f237d19c6b6b4efad897bc2847893ff7da34a4fe341. 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/QZFZ71986954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebf4f17632a315c820a801b6c5d3dc7c5633b83add09034ef04ffd4c1670613. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ71986955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ff440b6f9413d43cfdd72d529974565416ae6e6af766311107210f2e3bd303. 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/QZFZ71986956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68014fc2bbf51ef1eee16c11541e5dbef73d120f34dff18fb59118a14655056d. 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/QMPKX1891414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e03cfad5fc1aa5b8bbfc2573fb2cbfc2709222e9a2caa740b528cc9e26d04. 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/QZCE61864766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f5e062663acd7a1025430ba7c4536d6fdb976156b839ebfd7e82ff5c7ec7a3. 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/QZCE61864770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdb6b65b8531876d79a120af906db22c2f38996807607e75fd334f23e687e7c. 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/QZFYX2142814.