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 0xf65d1b74ef7f85b9ca375ec2af9ffcca4fdc717480c2a0e5a27d769825927fe7. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abf8919d-63c6-407c-86bc-5598e1478250.json and https://artists.proofprofile.net/proofs/artist/abf8919d-63c6-407c-86bc-5598e1478250.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 0x81d247f146be3428839688ce6575f9b27a77a08909c06b81397bc3888236de7a. 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/FIC3M2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0661067cb45985b2390fa43b8d043762dcf0d3eec470bcb50c8a4156a41b0b66. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIC3M2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5bf34640fd86e154db77fec7fb0acd2897abe5e8b8923565f25f11b0d005d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIC3M2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f33246351ee27f319b7ec9808725dc3a6f2c1e3a97a02457f150b2cdf87589. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIC3M2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6151fa0366c9288f13959cb46c6cf6938e4ab2685cb075c4d65244b77731ae3. 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/FIC3M2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3babaf4ebe4fc5f10786dc6d99ff7a069e81b87a32971a1600071b8fae5843bb. 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/FIC3M2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157b82768a63080a00787c1c5c7d73475a67d15350d1f07e94d909689ecf683f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIC3M2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315cf99b0c8c0dd9faa2880bd325f060c4dc6d4cfdc8d7367df776dd206839d9. 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/FIC3M2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e4e7ab741cc7d1388c148d7a41d0c16069fe10e4b5b580071c132c99c4be1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FIC3M2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf387c95ae696cd6c617e128d3337fa8179361efcbb768779eb2739c7c8bb0df3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FIC3M2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da21d8f2c37bebe5cd7814c2f32dfde5fbb6f72ca9b213dab48bac237ea58d5. 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/FIC3M2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe624699c1c0039b980abf5be1b7f4ebdc912e95aa408a8b0c1323a06e9fd4d57. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FIC3M2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdeb285166241a5e9b55c1c4e2631640241ff26a7ce8bf6a621bf7c48067b00. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FI2M82301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f5a2a3c8f725bf63da85485c0b0d94e7d22bcb990d0aacf9008d1cc07a62ce. 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/FIC3M2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454d64e4d5256cbe746ca0037bfc88882d0116e6580424d90a98c75b635a419a. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FIC3M2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5bf34640fd86e154db77fec7fb0acd2897abe5e8b8923565f25f11b0d005d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIC3M2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0661067cb45985b2390fa43b8d043762dcf0d3eec470bcb50c8a4156a41b0b66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIC3M2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe624699c1c0039b980abf5be1b7f4ebdc912e95aa408a8b0c1323a06e9fd4d57. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIC3M2300015.