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 0xf72c159fb63bb26edb39ecc5a86e193511a4eb1dca1cf686f2cae59483180d48. 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/0229cdd0-0dcd-4156-b01e-056505f9405e.json and https://artists.proofprofile.net/proofs/artist/0229cdd0-0dcd-4156-b01e-056505f9405e.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 0x57163096843ca1c23bbd5fa922e6fbcaaded8ba5a1a94a4020727a2e318bfe31. 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/QMFME2119146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18d5ad69590ed1eabcc74d94805e75bfc5cf04195446928b5d234eba58e367b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2111509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d7d521e865298d1c65056aba228187989730852cdc6a4600b565210f11bee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES64E2479804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce44a2f335353e3b784e5a77c82832ecfd5ab66cb82be6874c6c17086617cfa. 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/ES64E2463644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cb028667d4971705528f8916d99c2631d95a634a594d85ceb37436e4916786. 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/ES64E2453805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ae9456b5a05c3c33be6954d1d375ec69ef850d13258df621d082fc13f5476. 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/ES64E2338385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655fb7f11e117edf52e64355df6701313fe8ebd340a187d4f52098ce4e5eff33. 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/ES64E2303876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c6bde62ee18c5b0f4224707f5af45fbecfe2dd1615ee27a45b1fd27f0ab2a0. 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/ES64E2206018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbb79ca251e94cb659d8cb2ec2d16ad7b7752e7b5a5b1baf964a29a2bcf9978. 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/ES64E2205272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6ee292ea221fae3ae8b6750b70d6f478e4d2faba5d58ddcb57227dde45a39a. 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/ES64E2203692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675e08131851b46e9f46874132d6bb1076d04f933414a1cc1a8f7bfe96fb38ce. 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/ES64E2201523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3069fea33692446ab4e5ed0a4e7a84b9934c2a35fbc1771d352a950407a830b4. 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/ES65E2100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f0a32e4de66ce9ec14e7a2d95a68885877831c41d40bde1556a18432d3418c. 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/ES65E2100145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c08dc43b0f24847c8b2a30ed44c30205cd58987f35a12f9426a34a1f8c6306e. 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/QMFMF2125924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c748d8f67ee7da887bac02295f2bd0ad7e4a3b22a2a3b70b114b87b2f43539. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDA62127362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84cb954a1914c3144a17c07a0ea805fb5c5f9b8156a3241a367e2c08a81647f. 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/QZHN62147621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d7d67f525870823eb98cc6e98fa68197201e5bfb91b78f406bdc70317513d3. 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/ES65E2100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3f3b383b443aefadedf1bbffb4710c03907222df9ba30ca85a56a03697a23c. 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/QZNWU2036070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4354c722661c226b3077ec4e90038b275cb05a1a96054ce6c803e716dee751e. 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/TCAFA2041436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dbf004c60a4cbdf0470eae8f12babcecf3f9c4c517f0a4aa753f19ebf79acd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012172669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3735d124d55ce9a62ff6f06ec5f656aecb12a7bc9c010eaf446f4e32169630bd. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ESA011405623.