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 0x624ce83e073c06c47ed7418842448dbbe3d933a17e2e16c04e3f39fcf02de2c7. 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/a1c28af1-c1cc-4d5f-b558-62e1e8f04947.json and https://artists.proofprofile.net/proofs/artist/a1c28af1-c1cc-4d5f-b558-62e1e8f04947.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 0xe17fd645996f3f63327d81298e6297ad4ca4bad86ec6e06c40cde153a9697b34. 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/CAF661900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf47030391b3b5696adc748a378cde56372b657cfe816f319bb78512691e9c3. 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/CAF661900842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e7c37cb17546b9cd5f3055ae36dacef3c3e54eb1cbd65ce115dc6e65289af9. 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/CAF661900843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64a1832d894a2378a9acf29b2cb41959614a0bd371850ee37869a2419baa9e1. 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/CAF661900845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1888d67168331189c3b0ec824fcdc330eabc33b6101ba9ca17c16688b6beda16. 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/FR9W11828932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bc2cba30c54c741ea739b6bcdead7bc324a7150b4f6e29b6a07fb03018d2ce. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAF661900841.
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 0xc8356f10e96105399add2b1b6c866c0c35496844be6ade905187cb3c6d8c41a1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CAF661900844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42118359d8fd79bcbcf0a96563434a591140ab74469dbeb02a7f0c5d236534e3. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:01Z), 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/CAF662000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e4409c0eddf6c587abfcd93ad245e74550a3c1ff71ffc02c7979a651dac6c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CAF662000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155d73dcdfba4c060a363c02123173c7f62739342f9e3bf4798159e297e2948d. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/CAF662000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23eeffaa0e188a6a4ea6c40928597d75cf28803b2aa3fecf98330115edd411a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CAF662100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4a4433cecd06d94e2c99a4fde97e819d72cdde0045a723dc42c9db2c527d4d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAF662100306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b68da5021578766b52d2f3c544e0b63ef08a4766eeb156ef636225cc9c99d62. 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/CAF662201069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b68da5021578766b52d2f3c544e0b63ef08a4766eeb156ef636225cc9c99d62. 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/CAF662201069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff152016a3f35a8e24657b9be9efa48fd5a11fe0c1208a65707418807c41844d. 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/CAF662301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18527c1c9d0189f2538f084531073335c60f68051d84a37af457157b1518b9. 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/CAE1A1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401fabd5930cfe79f78a43f66a3dbec518666e368d508f4135d0702f13b3516c. 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/CBBWP2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd789837871caf964758be39adce02b4e6d19929102e64495b5d28de495ad0ceb. 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/CAH682100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18527c1c9d0189f2538f084531073335c60f68051d84a37af457157b1518b9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CAE1A1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bc0822842b2e0364375ea68f712c0ccd294e9afe359d4b3a5c84b5b086bcc7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CBBWP2200003.