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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 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 0x888272c3f7db58032527fc0c4e8021e926742218027c7779ba9d3a9d6261055e. 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/f379b35f-eda6-4614-8e80-3d6f328f04fc.json and https://artists.proofprofile.net/proofs/artist/f379b35f-eda6-4614-8e80-3d6f328f04fc.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 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 0xfa8a9bceecf9e08e38a87348768983f8c95fd2391e17e48a6fd35125e9f054e3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLVL1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9706e7412c127dabcb164446e29c6e95100c23a3ebc0f038183a98eb15d80d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBLVL1600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afad32adbc2f6f3daa695918eed92593bdb311ba6a72e9127f8add057023896. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBLVL1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d98728be6c2cca743706221d639243c4723f6e05f11eca78ec94167d834243. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLVL1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabfca0315be0ed7c81fa85440126d864c4701cbfd5b712595246a082db96759. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GBLVL1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1312aae762117e2b217872cd79193caf50307875bbad1402506a0d2a0dbde605. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBLVL1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c84906a581db3145e051de3af0072c72857f2192608f88385ad79f834acfdb7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USJMZ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf739c38e515343b3f0f1989166ad3b69254d02d81e50752557ea2750aeb9d196. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJMZ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d3174a073f41d43192901142727714b2c4c6032b08a05d3e8c88d4548268a5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJMZ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031e0de072d6bb67685fb6511aa0d8014cf9f1942be77c1b761a8ab116eb5fd7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USJMZ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52207fa03cda5e6518fb68f0131e688d390da17208281e68d0cbcaab82cf029a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USJMZ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e4a99c3f9ae5b0b4dd5a8384b0f4a245e165550c1a5fe2def5afd998faca67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJMZ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc7ceba59fb1555503452269c67686d5de54913ef22f6074691f287ed6f1cd3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USJMZ1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaee36210d5a0f44b9638fdedb9c951dc91f3f7d93adfd48a56f6ab89ac3359e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USJMZ1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5c8c21464c9bbbaa0c2f5d2d01cb45cdee5a0517cdfd163932e8a58ba2af58. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GBX721800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f2bb29ed1ba38d4401e19277b1d986e0b98cc1d4dda71eda537bb107ee84c4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLVL1800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f2bb29ed1ba38d4401e19277b1d986e0b98cc1d4dda71eda537bb107ee84c4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLVL1800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3825111ceb1d12f791c54cd9f7ff2efda7a7bde65c46e036801bf139de10cba6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBLVL1800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbad50b4e9041bdd3055a204c8924d5a3e54d1a13cbf6799edb9057e76f43459. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBX721900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53956ac9dfc5996b020868b6463d2bee52a84a587d6af7d6fa4f2801c9066bd3. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USJMZ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e4bb57bbe5f6376a18409afe2c3b6b91b8157729ca57cdc2d019cfeece372f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJMZ2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53956ac9dfc5996b020868b6463d2bee52a84a587d6af7d6fa4f2801c9066bd3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USJMZ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac246f2a0f50773bc1f953c53c356139b69b4131f6359ea9168e06829bd68f4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USJMZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd93178d5929848b32c1bc61eb976446a7de09f862b4a756c91f1486b250618. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USJMZ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66fe1ac71c4ad89ed7f3c6841e6c7bd94d841a966af72b2deb3d84c0667d9c1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USJMZ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7debe6adf637b84ed6b58e94ec29f91a3799f6bbc64f10f1e92fe3d80200fea2. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/USJMZ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf287bc37901009f65372ec1ae620e83eada52973bb5420dedcef5f3968ebb2f6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USJMZ2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e4bb57bbe5f6376a18409afe2c3b6b91b8157729ca57cdc2d019cfeece372f. 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/USJMZ2100011.