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 0x0134e740b0d0e1f727122cc57d6e38a4a98db6a60c0eb53536d06d5c56544dfc. 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/1468f6f1-fb28-435a-b16d-2a3715ce91a1.json and https://artists.proofprofile.net/proofs/artist/1468f6f1-fb28-435a-b16d-2a3715ce91a1.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 0x9c04c7596163091e32df476071eac3538706dbebe1298a21a3976891a261bd6b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12015186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb525842b3114623edc54470365a144b49ec0ae5bfc60e414ebc52d1d0f080076. 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/FRY680300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0b7ab83a0d88ff8a850147ef9a680f2077a4b045644f96720fdf1cf38d250d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRY689905510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bf2ecf644ab5fbd37777d802f48428c853d256722aa50065f858d506fd5c4d. 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/FRY689905520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d275a3cba9eb88a838e7b8321f94e8e6168f69c27eff9775733df194add1c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRP7S1500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64103dff91152324397ec3c580abfaa25606540d6fa3f026744e7767b610a938. 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/FRIDO2011812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ccd5fc633dc23e951cfe58b412551883bd0f6fd67591c7978875753f44bf7. 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/FRZ020500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f0f8e9d332443cf31d6394ffd71639110d6b542d5cd8b473fb59086b328279. 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/FRP7S1500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec14b396b3a00fbdbd3e4ce60126669c54d61ec5f3957180611c4ca9b1c6def. 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/FRZ051800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4117824493c6c2b5b86747a161ba340f30e7837d930487dc286cb4bde10b8135. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRP8H2200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96929d147f672d35a7669c350702eb515b2817bd56b4eff10b9e653a14c0fa14. 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/FR79W2300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ccd5fc633dc23e951cfe58b412551883bd0f6fd67591c7978875753f44bf7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ020500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6dec6ebb0eab02aa50b77318ca1b7c9592b509f3df842cc0667d1f98212cbc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ020601190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ffa213a25d4fd481c1052153d6f1aeb250955bd337adac37d8bde68ecf2a9f. 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/FR0Y32300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361d5f01d8ddbd50cc604ebdfc1d05b915495c531e33345f59615968fcb7f9a. 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/FR7GO2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d275a3cba9eb88a838e7b8321f94e8e6168f69c27eff9775733df194add1c9. 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/FRP7S1500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77cbd835aba480c4bff6db7e7275d131ab234c58dada6fb11e8ecb1c2d3f420. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRUM71001633.
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 0x249a11a3a1c76ce47d20c1e62a1170c31a0cc9cd5ab78b4dddd0dd00a6471f73. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/FRUM71202290.