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 0xfb8d1503abc9d61e8a6edab0981e24a672472571cf7407479d61c9f1cf1f7559. 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/735a6ba8-37d5-430e-a794-fe33c7ce7098.json and https://artists.proofprofile.net/proofs/artist/735a6ba8-37d5-430e-a794-fe33c7ce7098.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 0x96c5ef4321e50c4558449be0cceb64304f1fb794e66af1576b920e0811008435. 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/DEQI92400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248267054c2cf1b7cba870d75a0b0010b779592681624c694c5879766045269d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQI92400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd4208fe86ed08529e579b6b63eaf916f36845d6a29e606a96263d6bda017bd. 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/DEQI92400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29253f1559d5f4ba912ec004953d8ceef7b10de05eae7db9e7225e7afd647b60. 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/DEQI92400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e206598525ea75dc9c3bc8cb3bc9295af9161387dbfe82a5b3b42c96cd1f96e. 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/DEQI92400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d67c6a60045370f8a5e7b674bcc88aa49101936b23268c9dfd883b0f8d182cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DE1JN2375240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac88749225d77014d1ba70400507287f9887e3e0a469d4c05f968d7cd74e7f. 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/DEAR42334580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f0600e4243ecda730ffec9a1241cf870ce699dcd9dd504e66feec465756584. 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/DEAR42084336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3f9987f9645ed869c675f1cf76b0a63ba6012441d390c88e3c565369d9edc0. 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/DEQI92300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c9393b87d7c44b42b2b652660e41cd4a13540908bf92d4fcb1c1f3f31abb0. 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/DEQI92300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b253a2c32d178b6932958a658a944fbf17f3b31830cad6471f84492bf2a6235. 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/DEQI92300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691c0d7b0c85c6e54b15da271fef85f3763644a76b69d7ee92e2eab59f721e6. 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/DEQI92200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b6c48af5b2a46fb8be485bd9aac060be675292d14d416712f311097ff8e68e. 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/DEQI92200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d6b771524046e2b92e24c99140dbb794caed1a729ad406ee83fcd9120c987. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEY202100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdeed261d2d2d1c4d75752da4eb25239a9be70ab6ba2d6c82fd2e03abdf34ed. 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/DEY202100223.
Take My Heart into the Sky (2019 Edition)