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 0x72acfe91d8223157fccf42dc39db53a4f871da23f77e0c1b1112d1b8ff90f04b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2745509a-b635-4c1f-82e4-c4571d9641b3.json and https://artists.proofprofile.net/proofs/artist/2745509a-b635-4c1f-82e4-c4571d9641b3.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 0xb7c1b6e19ca6c94f1157696ec870eb260af7ad0fef3b8aad5fdc04cfcfdb7a45. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZLBC2507014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96e5f5afcb39e1fd7110d3e857422290233a84940e66b3f1349ac916ca775f6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:54Z), 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/QZLBC2506884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd45f88094f9819cc499ccab9a1ebf1603b820520a0eaf467355f1669448a32. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:08Z), 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/QZLBC2506885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf605b5dfd6222549a3b746f72513657694a84c123bd0b5a4f53fd448d753fed2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZLBC2506886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf128c12a5ae97389306d6516a4189e3db1f35f2ea6173c8391dca0bfefffcae2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZLBC2506882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88edffe8b34a3ded77f6ab689b0614b788e1076d127bee9079c7cf5d3cf2e5e7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZLBC2507016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac61b3f2536ab6a5e10e38ecc0146a471a4da9dbc3f41c540d3b54ab8b32ff8. 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/QZLBC2507017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe253ec5ccdbfc4c8c5acf6cb075a4d042f8ce3abde78465051778e80354b397b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZLBC2507018.