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 0x41ff2792c9dc6eb53ee2198471fb000c4d678b7c5c0a2055006787f1b469bd60. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ad76fdb-054b-49a7-a811-43f3299c281c.json and https://artists.proofprofile.net/proofs/artist/3ad76fdb-054b-49a7-a811-43f3299c281c.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 0x795bdefa42b3397e4e20c6b8b6da89afd0f4ddefc92d34694138f3573d1e8deb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJX2494461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abc908710379a3661f564748d6991e7785390eb842f98a53c800fccebe54494. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZNJX2494462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb68c5a313de29b6e8b84878fc03a846b013b64864366b5d6b6fa3d4d33d5ed. 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/QZNJX2494464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8572bbee93951c5f8cd48f5ed1db21f366d46480f946554df30a5e076270f994. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZNJX2494465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63cb15b717790d17c4d42e9d29c08378db50cfa9c0c3668efe98e08c2706021. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZTPX2444591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45921e5c93a5c1b99a10fbd70b6a3106ab6678875207d3851bcdffa848351d57. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTPX2444592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad4ec10a6e8fce84ed2f7c6f19d7d4a33cc1fd9aa2ebeb36ef4adb606f8d44. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTPX2444593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fa38e5b200ba73d285a1e3e0af9e0486bab1908ac1fc50932a27390a0a5b61. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:42:01Z), 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/QZTPX2444594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011bf14ee15cc8654a2926ba102bf04c97c217dfd569cf3caafd676ff847de9f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTPX2497770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186fdf1488dfe40729dce552bc8ee9c8a15ffbb0834693dec2a76476a46b8553. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTPX2497769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d65146e4218cfd58b01f78b8efff16928a507cb86cd195c402af168ace63ea. 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/QZTPX2497771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaf4407b992572781c8ae1448637f1a5877bbc81672dd5025e4f12b9f188a64. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US7VG2527718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d46cc9e9fd59816d9c9a25764c7f40ffef0f923abf44cb17caccb918e99760. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:56:23Z), 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/US7VG2527719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c3fbeac9fc5ed80abaf578436e7037162d209ca55d4da901707df5ad51bed8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US7VG2527720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6010cc72226eabdea9f08d5828c3d4fdc141c541075f4fcbcad563691290574d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/US7VG2527722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cab2fabb691e1fc77f759ae334e5dd7b99da95fed0c4369040806cf60654f5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZNJV2599792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d80a85ea1e95143821a02ed6df699db73a1a8c2d2b40ae2af9d9eda0468223. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJV2599794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9b216b41a4ea8ffcb9faad1d78344a57287b32bede50d46c842f43e4ef78ec. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:20:57Z), 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/QZNJV2599796.