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 0x0cc79ab706213a885000e40f0da6e597415a8588fa3bcbe354c75022c1027977. 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/1fea53c9-f72d-4f9a-9cbc-a8f746b42833.json and https://artists.proofprofile.net/proofs/artist/1fea53c9-f72d-4f9a-9cbc-a8f746b42833.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 0xd8f4364c9cfd9d8bce02b189e29ef4f9de3b2d410c4d21971e236d6f86744cae. 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/GBAYC9503390.
Tchaikovsky: Souvenir d'un lieu cher, Op. 42: No. 2, Scherzo (Arr. Glazunov for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe625efe5f9b736d5f983310b09b9df447eb22186216aaff1a2fdae8be834ef38. 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/GBAYC1502006.
Anderson, L / Arr Tunick: Sleigh Ride (Arr. Jonathan Tunick)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d9a9de99dcd3d174288c52b35d2c4459849bd0059c1fa885e1e2219d87b92c. 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/GBAYC9603845.
Traditional: The Twelve Days of Christmas (Arr. Jonathan Tunick)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f6b6e633c543c933fffbcee21ccf576a74ef56bea5ab25b006e73ece46214. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBAYC9602544.
Berlin, I: White Christmas (Arr. Jonathan Tunick)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d1db929819dbe0109c9659762904b28120f7e380d6ff887b20373258bca85a. 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/GBAYC9603854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64883cbaaba23e7c5513d4e2b99cbc3ab20d8b653d8bc3f00c60d13ba5f31e6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBAYC1502000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba6a3cc675473cf32c29f8d4b1f85198b46edc590c36fd06195710a86a80ebb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBAYC9600613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ce32f8fe2d5be310ddcc595e429ed007c5bcd356d9a4dfb3fa08eecc6b3c92. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC9600619.
Gruber: Silent Night (Arr. Jonathan Tunick)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681315a58b4ef4ceaceeade0d3fc708423f9f2a923379960d92e3e536f5a5fe1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC9602849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523980c22c26327375fa4e93ccfcd0a8999b1e5c9b370c378a24d231ebe4713b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBAYC9901587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba6a3cc675473cf32c29f8d4b1f85198b46edc590c36fd06195710a86a80ebb. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBAYC9600613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c31b429528c0fccb76a5dd5d477fc174d53baf2053a85fc71dc3234233daed. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBAYC9600615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2433b9cf596a95df5b07af34f2340fefa9b7b332516ea1386c74b13cc3dba700. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBAYC9600617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ce32f8fe2d5be310ddcc595e429ed007c5bcd356d9a4dfb3fa08eecc6b3c92. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBAYC9600619.