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 0x1d8874e1718a1ecde38a8004f81d974e21f5a4bc5dac293503de681d5fb419b2. 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/5e42f57b-d533-46f2-a349-df76b001382d.json and https://artists.proofprofile.net/proofs/artist/5e42f57b-d533-46f2-a349-df76b001382d.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 0x1e0dfb69e095d80f3c81b800680c09e31e0872593144c1c8f36452f454902c48. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX611400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4c5dd0649ddc445fe8553495c855ed8d24c4d00e9bdaf89eee9f967cd2529. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX611400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87c39c99c40e0f98603aab4b0f0875b08f52d1c42c624d6e81eb32fcbd9ccd7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRX611400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6301e3b4db863b6ac8c04da1363ff1afeb0ee0cb6672ffe1c7d36174237d8b6e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX611400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0b7064a88f13fb5fb6f9fae318fefc529a898b918403948f8b68c8915072c9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX611900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c64b8f1ad8c04820f4cc401710bab722d2b8aaf063507ea8ccbcb023f535c4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX611900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe7c9e74cf97fdc3d973c466e99c943add16af9296869233f5170c3d15f2914. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX611900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76349165fa06e4ea0d5f913cdd7072aecbebd1797a5efae03f411d23259eaf. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/FRX611900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b74e93e285a83f129ef3485a03dfc2d82eae5a25d6e007ab64debc0422b84. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FRX611900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c360c7d772e21301294863fe53eed24642bd2aee9905417db3fbd74b448624b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX611900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf9a3d2778ca04bc472ff4df0eaa437575da247cf016c11753ec3d52e35d379. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX611900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b09503971da33681b858320875f8421284707307231cfcee117683c1a0cb35. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12115765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8423c8342e3ac3bb95a49a752ad755da95d4eccc5b0ed6b59dc09924053917. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR9W12115767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f66c10719f4174292c4cbcad836787e36381efdec6bb191bf2d2251936a0f0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR9W12115768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b08f5975ac9079a965f02e85978934e278f28f9c384596a5e69e44dba1f55c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR80Y2400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eebb8adc1e26590ee328a936e4c30bf28fd33b027e81c37e9300adcff21f9e9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR80Y2400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a25220815f7d94c2f6173a2e669d8bc064545d1a4e5287a1d384657a242a1b8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR80Y2400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e2be11cb982d9bdfd9ea3e14bf7ad7c8a0f51ee57dc2a0fc31476823a52ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR80Y2400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59aa14d4140254f86587c29d5a80d6df64638510775daf5f2af12e7e979dfdd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR80Y2400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901e1806c913e4fef18d5eeb192aee87709fba800d7a5e7a0ae28f8995eaaf69. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR80Y2400370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c5088172df28d16dcb1cef739cfbe99dabdcfd4005efa953ec5e28dd34bab3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR80Y2400380.
Musique celtique: Envie de Bretagne, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe7c9e74cf97fdc3d973c466e99c943add16af9296869233f5170c3d15f2914. 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/FRX611900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6301e3b4db863b6ac8c04da1363ff1afeb0ee0cb6672ffe1c7d36174237d8b6e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX611400314.