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 0xc051663976ccc7e48224ee6b81eb037b21504fc087fd4cd2c585046194546df3. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87ccfc10-d6f8-49c2-91ae-3b513dc9af91.json and https://artists.proofprofile.net/proofs/artist/87ccfc10-d6f8-49c2-91ae-3b513dc9af91.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 0x4c76a176c40f55f17cc3a1fbdd3a6647d3cf4860616b1368d82a1a150e52a69f. 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/CAENV2598033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8c1c743d4b5bffff98a7786b44c42c998e056628a82046b7478e04d809fc04. 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/CAENV2598034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3833cb72d36a3eb67696702cb8d77d2f271889a8244f974802991211615782f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CAENV2598035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23da438ba8fd88f3e0fed4f03008540525781d696d81fb7452d8382b895885da. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAENV2598036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa830e54e48f98bfd190fde22b9e070f4b12f6b202d4ed5b0adbb6b5bfb8783fe. 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/CAENV2598037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c1612f6bfe8eab6454c4e14f99da8014c173dec096416a912b56e38119e8dc. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CAENV2598038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957c7bc3847fe238ba301a556c94bf1c71d05feabaee1bc15cd6c9f19aa25b91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAENV2598039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc6f3b3088b1166b3f616df63c0a44626e3f9f2c24792f7811ecccd2fc295ad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAENV2598041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31da3e480c08245c0dc0a8101770ad38d3393b156949d69b986a6c55cc5b443. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:18Z), 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/CAENV2598042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18825525a04d1f4aa73800631abef9e20d180322d3b44677f55f99dd37efd87c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAGOO2503287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6ab8bb1d1941c58b1c6d234946bace7e9198be04c03ea1921ca99f6131b210. 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/CAGOO2503288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d1ca3cc8d9d01f2572072c4db6da3e4eaadf405167f4b208a7302556bc1de9. 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/CAGOO2503289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda6a67d4b4bd28a8bd253bee63d850124e69b527b585bf685c6197de86bda8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:54:53Z), 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/CAGOO2503290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8c27385e853b9195fd69dbb0a69e391b1d4092deaeaf5e4ce45a3b07599b45. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:49Z), 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/CAGOO2503291.