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 0x98654dbc8f0b8726a930f3587307a1d0e93fed26105cb8d334610df2848d45ba. 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/eecf1269-9e9e-4a0a-acaa-83efb4affe70.json and https://artists.proofprofile.net/proofs/artist/eecf1269-9e9e-4a0a-acaa-83efb4affe70.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 0x9d09a1a18e5bc08952fb04a13b72ae485959cd6dc923911ec55011037ed3e953. 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/DEZB52010051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466942b4787d80eef9dfae8135f44b28f7cee911921f4836745b5ddea2699f44. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEZB52010052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ebb6ffef3793dc62b4bceed60c524fe54a81b54c51c8338542899bff9e539. 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/DEZB52010053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce90ef09bbf4cc31b3fd9bb638a0ebbd2dfbd05febb25b2a06ea33a05ff6d46. 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/DEZB52010054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012261a82e1d2fd9243bc6f98f5524993c1fdad32ed613dbd780056e8b1a3728. 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/DEZB52010055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98628879b622c06c9e2190a6292d1b13bd3c745fd24b6a8bb817e2e4e32fa8de. 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/DEZB52010056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8e213adc22e5383a738455164e7032c9af66404f8529631c41f8b16873eb45. 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/DEZB52010057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba759d083c7ee6eeb02f201c53c3ccfee5310ab6f4b0238d3c5357008fb256f5. 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/DEZB52010059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad734a2c993381dd8462064c18961bf27eeb8d889a04a8123a6d8b6560d468a. 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/DEZB52010060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ebe898d15f85c5d12d879986aba2bd5dbbc5d6c71a736b5eb56b299154817d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEZB52010058.
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 0xc2ec66e9bc4d462affc4ff126c7ae9aba57f67d3745bea5c90ba81b4b7fd5c30. 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/DEZB52010341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8cd95385364488d7da4d6fff6abf076db22585b69242380785d3859d0a3540. 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/DEZB52010342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d6c6b20a749bbd20839c659beb81a7d62e88ebcf45e6a7ff285bd6754a1d53. 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/DEZB52010344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8d138aaa221bafb36b2a45e30e4415dc25085e1ccbe6afbe2c850a6a35d9ec. 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/DEZB52010347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48bb96fa2756cbc01c0a1033eddda907904a58cfd524481ab59978a86d03e12. 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/DEZB52010348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e45b476c97de8c6a7215167fb62212194e1f2b3465da170f70f1e1f227c02e. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEZB52010343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc47bc8b334ce7ca2d3dd3648703d470ee18d3fd5bb90de6f43f02e1021bbef7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEZB52010346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6664ec56764fe314fae96f2aa544f685722802f9d06913fa7e7f65441d60e4b8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEZB52010349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa070682865b480f0fcb6199d42d86ec1b4a797c1433c152f1f05d6809cb272. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEZB52010350.