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 0x3579c5eca9d65065d6bcf61d573c861b44f8d6d7072dcb8cdf564077d48ee32a. 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/ce3a430b-4a4f-4978-8f39-958183944a83.json and https://artists.proofprofile.net/proofs/artist/ce3a430b-4a4f-4978-8f39-958183944a83.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 0xd5f974e02f1475a01044c9c66b8a1563775126581b54969f0884ef86f9e8c705. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/VNA0M1908436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dadf092fd9a11e25b1da83a35194cea69901540ba34b2fca30ab8c2af423ac. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZPLS2243614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58e2403e3e315ea182975f37475a2ce3a3aac4447117956fc3ebd0b9d7dbf2e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX872382368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a2f0b24b63f7bf37f7529dacb94867931be4a07e8504cb94bfd274dbefc506. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FRX872382372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8d35a42d548198eb0dea0582340a4b01af83833e28c44f8692bff4d8958b2f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/VNA2F2401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2cdf3718ccefb36830e923e580f85925fd52288f30b6a2fb19a9e7a6689aaf. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/VNA2F2402405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c02219d3f8f4f7cfd83d06e92bcb59da20967f340e5003d559d2ee78193ba8a. 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/VNA2F2402406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6c3d79db4d6db23486732ed32e28b333b987fbb18fac859c4caad93248b9f6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/VNA2F2402407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad154742390d63eeefa5c8e74cd8e68d86f60907a94d192eb6804d51f24f956. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/VNA2F2402409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4159faf954b25d69c9b7232da6e66100ff3c7f19ee83307fd74752b798ad2d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/VNA2F2402410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e2c5cadff2bb0d071eeec62187e4f32d16be6d424455a8ea20f676815820f4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA2F2402025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0725a9db2d92c2f185f3a0468fb65934e6be62f39f72fb39ebce341dd7d4d3. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/VNA0M1940176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2735626f404decbee1130c55ae6d7980d369f147d0ca97aae2d492b7f27e25. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/VNA2F2500294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38708c6fc01b66f855a6e6442a43fc7bbcf5ac4d32dbc2e3f5aacb921df6e624. 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/VNA0M1942601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e345c6e3458d404039b125b585b3e2a400d87dfe14f05556b42f40b1c485835. 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/VNA0M1942602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060218a74796556f0d9ef35857d98a7444dd5c138da94b979df0446f803303ca. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/VNA0M1942603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cee0d66519ef0485787d369f42b790a2c9bb724f9531fb36ed5c15308a526b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/VNA0M1942604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d1e3a62601124b381c93d0b609081faf1e3f8ce6edf8cdb8a1a4d0afec51ac. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/VNA0M1942605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd5f0aa4d10b40454cc67d807eed1fdb1b626015d720b6041b8914c882c4cf. 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/VNA0M1942607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa332b268c93a0bd4e41716e3f588c7ac102a8ce061eaece0ef5af5654e0854c9. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/VNA0M1942608.