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 0x80578a6ea1bd8164ba2496ce9d7459e1d3674c76d3808949c852cccdff6c1940. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/236f2928-41ee-430c-aea3-3d7e42f25bb3.json and https://artists.proofprofile.net/proofs/artist/236f2928-41ee-430c-aea3-3d7e42f25bb3.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 0xd8a6b57d3797eb654b591ae97061aff3edb7dc25913dd87dfeb94b484117d383. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA062071552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e88e7c34f187cafe1451c5e2e0b9ce2589dda0eb08af0f89970304ca878d506. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072144040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49a6b6e22cdc6303908cc65626fc0cf13bd023cecb74629a5e0831c7c36226d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R2105218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d50e2a8037b0f9bd179a08732264650f5b29494ebcb4c320c523051baa2dd3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX452113684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88643967cd976f7b6d462c273b614c0caac3c54655bb30900de7010f7e86f73a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2198102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffce20a9c70d97b5a3cefb91c7923cbe7c921355c4020c160ccefd132a4ef9f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX452113685.
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 0x77159ec7386b7349d2ff9edf632717ac11dab1cc2b3f107782d503f3b03ec652. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX282139989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfa4626fb55281172c701fc90648f674e274422deb2470d96f54fa93bcd7aad. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX452113686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737f9afb6bdc006e37fbbd1767a7a79f9ea770d2788d44f882d4788efac9054e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX452113687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d71885642c7359f1bf13b71ae770aa5303901ca7ab005fb5c2a148aa6711d9. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FR96X2104678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed860dd2e941b3a1cb6410a6300003b5f440dd6b796c3323e7a80dfeb6a3d3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRIDO1811837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6fce7a33e30b552284413bf30c4207ecf0c61b5357580ebee723bfcdc4acfc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9Z61800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36b5588bf1dc1e11e1729f26893d7ec3164db43f3799f252fd1c2c00875621a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFH2324531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175e25ded5089895e43db0b0c41e00e4b9bd33a54a7b7cbae66d7349c8c7afe5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADF1789642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6c36a4e7ce5eed4085fa31d0f73840897da11f4d41cc665a691743172df72d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W11507376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f9ad50ec37e86abf856949549ee4817342d5d9c1c72892c2feceecf6530e60. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W11507387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd882316ab488536aab9a366e4b4eb940233d7da83a7fc744c4b1d6b1d2db9f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZGWW2089418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2393a2f814fac48d65be93e786b827708964255253f1fce11819d2d7f354b49e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X1936946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054cf9270a53af37d3d2d9f2d6b4d1c3199ed3675a2f719fe693883c9b4ce2bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X1936947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a232809bb12b03650950a933f1abf69e7e53e9e7f1076cc91b326a95b0c73bd. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCAHR2349759.