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 0x65e8bf9cbb772da2d1f7abfd99aedb9ee6fca16c1157cd1126cd74501f8e6901. 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/636cde08-7c1f-4f1b-95b1-de749e40a6fb.json and https://artists.proofprofile.net/proofs/artist/636cde08-7c1f-4f1b-95b1-de749e40a6fb.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 0xa23843c39455ea1df53d6d03d5f013fce38f21cff89903bbda05f1aceb4118b3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES6102425502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba6c5aae0289bc77a662c0355eecd59148f44e9b8ec3eb92f2e181868dd472. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/ES6102425505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e1f8a945e4c27209e79c93dc50147d343bcca3a2087f1f2a53ed0b24700e8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA560502602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c5b4ad1ebf55eddec72595cd4d5e47f279620797a78689106ae7833bcd2c48. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:49Z), 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/ES6100313703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d1d544efbc0b12bbf329fc8527ce415cce436d2d0e085f63666343e72420a3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:09:16Z), 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/ES6100313706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1916c16f1a08704146d3cfe4436d968dff8df384dd10f3975e2a22c1b9670d0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA560523476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0f79588e5a4bfec7f9ff43e9dd72ba8cc2e82603e546f13bbd78d911df7514. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USA560523464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89f383a96bc03456c96a8591253c9551f67fbd0e341260966a9e6a49569da6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:46Z), 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/USA560523468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f07f9c09dde98bc9fa870a33f8c1d2e2f3e57d327ac287498d1f468d26c925. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA560523491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6cc854774c40c449c9e52a11b88ff7ac1477fa231ed692a5d2c3bee5c34752. 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/ES6100494318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92aa4ff1ef8daf8271cd24f65a769f77dd5382c59778e829bed5bd79fb06809. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES6100022318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ea20a90cdc2faa95e431d3ecfde721ead26aa4825cc0e49ff7bb410925157. 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/ES8021309502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7a9c886f98af25c2a6c3f638cd7a3a366c3a3515d1607c03668a49b51c99fd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:17Z), 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/ES14A1504372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b2e0557ed6b7b1130e81bc4fdd03fc7c43b6549ccd82d67c9cf680741dcec. 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/ES14A1504382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf36883edb847d9320e9dd98c429644487b14d4e57cea291ae65597951738c3. 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/ES14A2007672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed7255b0ecbf84dfd6339b84cb1d8f33926d9ab50c842f5263d7a1f5c0c1242. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:49Z), 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/DEAE20800052.
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