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 0x84b96d57939847168fc7e1fc05ecbac122a2564388ac6407a92c4aab8283f895. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58ee99b1-ed06-47a9-8062-704cfcf650a0.json and https://artists.proofprofile.net/proofs/artist/58ee99b1-ed06-47a9-8062-704cfcf650a0.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 0x2ce8333173b71bb0603959f74e97834309c1a43961f8fc51b841eefdd256ed9a. 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/USHM21206654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf687669fc851b0c76ca1ce8acf6e27ff33657406bd7e16022e5b80552008be99. 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/USHM21206655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6779c57366555d33b621a5d04b070d97a88654cd7cbb44a50cccb2592f4fed. 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/USHM21206656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5382c2d0ab0ef59886c8252ea4044f5dc297ab5c4e5263b44082fe82a4a3cd04. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM21206658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f80f3e51df8db16b40194f0e8ac880bbd01215d5e67349959425d24a4f544. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USHM21206659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4314ccc3fe48d59d52928577d809d31e20793bf7766ccbdb688656e8f3d3181. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USHM21206660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a837d58c9c66993a66635235749db7e20817e8d6db27db9f5422f993336978. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM21206661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad3c6569764d6951d9375c1e6f9d976f690197be4eec8a4c98f377512d0b0aa. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USHM21206662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c8b7fe24e031866ca61b79e7ae416b28ada4f9c0e13f09f30b5ddc18825313. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM21206663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdad1b3860f14b74f5c0686bff89c29ab759beaf6b13072fe6d3781c721f40a9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USHM21206664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8467b5277f7e88692e120bcf2c7318b4b8b3b1544c6e0ac960011211093257d. 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/USDY41830963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64275a7e8030c5d7be9178d6a371bc7426202c1ca3c1cb05f4c09f6cb02f9ef1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USDY41830966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a6c58548b4d9491674ff91ab66106be788838082dff94db1475bdfd572b8d1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USDY41830967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc8407b4b7af8fac3205a2bebe90e6663a1d350345d443181e94860e8ded5a3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41830968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb47ef149ca83f1c54cd85b0319411dda285ef8e53ffbe9ae9714356895a6f. 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/USDY41830970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc22e9ab82d9bde140703f2f57af55ed61928cb9331f0d0fdba97fc4249ed5d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USDY41830972.