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 0xa69eaeb30696175b8a02bef8640d2bcea4ccb8aaffba6b5010337acd1e19980d. 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/b54b03c5-242c-45f8-b155-a91ee82983e4.json and https://artists.proofprofile.net/proofs/artist/b54b03c5-242c-45f8-b155-a91ee82983e4.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 0x1a4fbd27522c4e55d4c2c453fc4f26f276e5ef10a1a74b7c57a67a3d35ac4c07. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBNRN1791030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dba5c7036e421fbb0d28af5b1dc4db78c89ad77b247c1db466a09dc29a6e5d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:36Z), 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/GBNRN1791036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c7c2a888a23fdcdd078e1fe81eb6c4d3c20c1bc09f6b3b87ea8116d2e98380. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBNRN1791042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb802eb3fc69a97b5471143b7d1c0ed1b852221c0e46e7b357eee0730bd3fbe. 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/GBNRN0017502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c513697a322ce7982e9d217b5339b451447309a1cfc4bb1431aa77c002af009. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBNRN0017504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed37b0c5e0ead81593762aee17f040b212078da78d1e90eb700575fc00efc48. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:11Z), 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/GBNRN0017507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de1c808b0de6cf446e2d26e6832128f15f8cbbfb0d5e1d218971dc9f27f3f56. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:21Z), 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/GBNRN0017510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dcaed60c00b1b84b8b20c425ed3d7839c5c2af10e09af2a927bb3a56137502. 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/GBNRN0017501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27393b6a751a0bbbb85a0f657cad5ab07cc6a957474021781296732bd1d36c16. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:02:31Z), 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/GBNRN0017503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed37b0c5e0ead81593762aee17f040b212078da78d1e90eb700575fc00efc48. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBNRN0017507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a9a583937bab41359311ab4d577edfa6f0941ef39baa306b3a83769492e64a. 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/GBNRN1791224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7b47fe282bb978b3217c4d7d7502e56d1cc78eaf1116704e727b032381bf50. 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/GBNRN1791226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897d5d69005052ba54bd737a40fd2d7ae2a67f78538ee769f6358caac6513be4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V82386098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2e4f92f44bd38ce419f7872dc35a53358a7cc46e1479cd4ab29bd65b9924a. 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/FR6V82386102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94959acded846430ee703095d3602ec62cdb4c41f87a87170cd23ac3e3a632c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBNRN1211501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1675d4b7c8a4aa8358844ea4269c42f7a6dd770138c6594c3c4218b11f66a95f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:36:59Z), 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/GBNRN1211503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84eceef5d93bd04a038053cbd38274996b35a08f0ae2338f488944163bf1d36. 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/FR11Y1600006.