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 0x8e902f27abaff2f3dad8129caeecf15a2b539eaa818c1190b155bdd2af5f9612. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3b9982d-a379-4ed3-bcd6-cfbe341c157e.json and https://artists.proofprofile.net/proofs/artist/c3b9982d-a379-4ed3-bcd6-cfbe341c157e.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 0x035c7ee3a9b0897f806e6f6bcf8d4806dd7ddce89eb3e6fc18092e34637884ed. 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/FRPI62300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035c7ee3a9b0897f806e6f6bcf8d4806dd7ddce89eb3e6fc18092e34637884ed. 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/FRPI62300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7089d76fc3a5c006c217ac643ae69018d10e4be9f5644e63f4a1917586d5fc75. 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/FRX852305700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e29935a79e72cda292d6fecf823c26cde749d0170c43ad3159e4ee4652b3b3. 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/FRX852305850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1cb4e6917f72bdaad6fbde349faf601602fcf122ae314d7ca7389709c8aeca. 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/FRX852305720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dc238a9899c103b04a2bd8a52cdfdc786002e573102b617ef8754d0d86b9ad. 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/FR2W82100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bf07f17c4f3e5b536d48bf1f1c9589465f0b9890af627f5561a57bc92a51ea. 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/FR2W81800006.
It's My Life (Reprise by La Blogothèque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bab3b9a35d29733a71b24cd0c634adb993ad36c6a82fd308f8fbca535608ba6. 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/GBCEL2100683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe018d2109e6f059982b7825a3b944fd89770f399c91b8a337d34ea043e668d6f. 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/GBCEL2100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a882a6aa2ab2dedd11da3dd337071e8e565bd7aec4ce647fb4a57cd05771c1b. 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/GBCEL2100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a882a6aa2ab2dedd11da3dd337071e8e565bd7aec4ce647fb4a57cd05771c1b. 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/GBCEL2100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba16fdde352d1b4b008256c06fc37769c6e4ef73e63c8d94e83db0b1ef3a9d. 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/FR5LE2105502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04881591bba1baacb6df70e2e6428c0f3666108f202a51f289b69f0a140b8498. 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/FR9W12508860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba16fdde352d1b4b008256c06fc37769c6e4ef73e63c8d94e83db0b1ef3a9d. 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/FR5LE2105502.