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 0x51c528a2003be550b5348cc0431a245065d50fd925f0b814d4c306d823501893. 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/0bca86ad-ca6d-477d-b869-ea25507e37a1.json and https://artists.proofprofile.net/proofs/artist/0bca86ad-ca6d-477d-b869-ea25507e37a1.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 0x8e61e92a8c105d68620be4685dc09368b9ebac3ac8f312bd17b4e5b9b4a8eb00. 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/PTUM71000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ecbc00e24d1ea9934514d4b0a11728197ac8bb8da864d1960f450d4c4a1ef7. 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/PTUM71000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0945cc2ad55ee732d3fa5724e54d49d31b08a52bddb9ba571c2e8091889d97af. 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/PTUM71000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853bc41d4224d1183c5d06c624a016dc36f1f00113b7b2468404a96481cbe1b1. 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/PTUM71000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ead16325fe87f5d09634b1fb4c2a85514c9274acbefea3f7451b6885f86f00. 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/PTUM71000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8189bdc4b66a5d102bac6c8f002e0c100ceafb2cc4b96c90a38130355ecdb4f. 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/PTUM71000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed3772e71114b0fbb37d147464de36f53b3e781cac58f7624bcd0f8183be87f. 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/PTUM71000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde80717fe86727846455ae2c59b8edd3150b08aaf41e7547d692c744dbe0553f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/PTUM71500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527922ae048373d501a160ac0b0777e9ddecf3b5bfd4ba6653262e1b4c4eed3a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/PTUM71700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499355ff5f19edde8feed9d792a41494571f1071662bec515d72890d95d5d8b2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/PTUM72100576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2af8fab3be72de119e50040f59af6cc7ec7c4a6602612b1d680c75d4799913. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/PTUM72100729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7017f025213af97e913f13e040700f1dbc9045d1859579ee3e2c91c0402164b9. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/PTUM72200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e71f6bc6eef0b19b833de4da5971b39ec60979bfc6754defd41365dcdff5c2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PTUM72400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e71f6bc6eef0b19b833de4da5971b39ec60979bfc6754defd41365dcdff5c2. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/PTUM72400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe818b51c5995db784068cb74116cffe653f4724014916d93a84a02e26a9bd350. 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/PT6GX2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ecbc00e24d1ea9934514d4b0a11728197ac8bb8da864d1960f450d4c4a1ef7. 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/PTUM71000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b95eafa8bd907611d6121fe99c2b5dad606960d1e7763fdcb54053e2fb78ff. 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/PTUM71700291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebbfb6828228121d40f7917bf44d725f046fd865a1d8c0d26049729e08ddda3. 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/PT6AN2100002.