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 0xf3a71905f2dfdfb272bfe7c30b93609ddb5d843f0cdf525e185469306c7d72d3. 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/0eed3e6a-bc24-4bd3-846b-968a5ccdd05f.json and https://artists.proofprofile.net/proofs/artist/0eed3e6a-bc24-4bd3-846b-968a5ccdd05f.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 0xf87ab228c2de050db41d0fa825feba93f5b197abbff82e1c4b41d4bcc0c8c99d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2443012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdef4fbb06f6a1bf0c1bb24acdeb4971ee4c5372dd524cdeb2356dd295c52f3b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR10S2443015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbdbba79dc1ce45a0a53a7e6bcfec7d9a002417585732adeb642ed5ed28e280. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2443016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5951846d5f4a9417bd534d4f31c34ed3c9aadff5443a92e7766230041873ffd. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DGA0P2475006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4edfd4df9c5557b8c87f0ddbe4e10f87277a9f301b4a264df7f7dd9b576c463. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DGA0P2475007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c78694634327ae6cf10f53ebfafedc862aede585058a5aec238d3b7fbae8a7. 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/DGA0P2475008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cf3a6baec239273cd84532b96cff20205b7a1daa490842f0f4dcb112916a50. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DGA0P2475001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4f8662bc0e6f6b5a8b37655007f4ca5692d338411770d3a1a620bbb7535ce4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DGA0P2475002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a7e20fde0309b5220b5128fc57567a6670e737231ad5d1add4da295cef1882. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DGA0P2475004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3907f697a9dcbff18083a97cd0ccaeca0c76387e121b821238757fdfbba5b66e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DGA0S2465190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6f50c533f40e9e52233016537cdd0505d6ed0ba4237ebc0acc5c7d05230625. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DGA0S2465191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe549b1bce6580bfc2f536126960e762eb34e1417ed00cb57b2a405447ce299b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0S2465192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a57f9734abf20e1d443d5fe7767255a461b51d9958199cbdffa9bf51277c9e8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0S2465194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8268910edd9954cb2892bd81a8a57a23b173911357eec9cb97ec7c1cca09aa1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA0S2465195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2e2463cde044f35f6fa7fcd4bd1d80649327f5128a3e3effcb6023354e7841. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DGA0S2485820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09f9e0a032061289256147bb22e2286a1e6bb2ee169fc42aba493b26b168f10. 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/DGA0S2465204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e535c323c7ba27020669e24485e0132406986454c782002254f74debf7aca62. 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/DGA0S2465206.