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 0x12c736c06153dbb8fa30f75d1bea48e9e9cfee172ee31dd0797ff90c1546e751. Chain 2 (Bitcoin): anchored in block 953985 (2026-06-16T18:03:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d87a5a2-d710-4451-a326-827bab01208f.json and https://artists.proofprofile.net/proofs/artist/2d87a5a2-d710-4451-a326-827bab01208f.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 0xfdc58bbfd3c5b52e5c8cda7b7822b9d582e8fc672fefd11af6c56c98af0f6635. 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/CAA502350602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde502b316d9f1b0947b4a50ab171a26608eba76d5b07f361a9eafb5e7780234c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAA502350603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65179ac033c4661787d17025198ff592ca64f1349b53c73d3b2fc8daf17f4d24. 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/CAA502350605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8742a9b7b284a4b39ca86387daebfa05c7449672756383855a7d2689d2accbb0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAA502350601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09243a84268266f3f5ad891b3020db929977e49b85a9a5f4715f07564c534c0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CAA502350604.
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 0xa0f92b922fbb64480f506d89a9f76dfe2f0df69ed45bbc84d7171ab0cf4dc245. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CAA502350606.
Comme une pluie fine - Version de Jusqu'ici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c7bac5ba5fd1b16c1caf0bc71ac25f872e053a991ebb35278bfbe2126b3f6c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CAA502350610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2575a7eb1dd0e9899d01a26bd74e5da6912c65013dc04722280f54aa3ba494f3. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CAA502350611.
Intermède (un moment de grâce) - Version de Jusqu'ici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940e31ed8080295322231baa58e91e3827ce31e60ed93a529dbe711b2ee64513. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CAA502350612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1658e5136f58abe8548f7b4f4a9bbe02d5b2e6879507a163aebd91ff53cbc77d. 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/FR6V80625321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd40eb5f6b8fe741df95a7e2d2163cad0dd5438d4b0b937c2b16b77a722acb8. 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/FR6V80625322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc308bbcfce949bf9466b702e8e4bad3ee062729b92098c3f40d2368ccaffd36a. 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/FR6V80625324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eaf0d7cd13e5cc88d77c7ed8db6a92e212d34acac1e27954bfa47414166386. 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/FR6V80625325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9611f678de9290df1949189eadaf4dc7c0baed690191a9b466c191da70e27780. 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/FR6V80625326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf0a1641054c7e3fbdf0b305509de7ed1a67b6add3553c4f3b5521602e147b. 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/FR6V80625327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8802e9717d6cb536dcf3efd93d6878d31eb69c3be17ad719209f17af76a541f9. 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/FR6V80625330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0560de60472cefcd5c21d11533c5c48dc9d1ce8a14c7ccf8fd308be947b1609. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR6V80625331.
Festival en chanson de Petite-Vallée [Où la route mène (L'année Daniel Lavoie)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750b52d498d01090aca964b6e09d9ad3896fafaddbf03dbeb0a8098f58c59841. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAV700718403.