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 0x61a31d2ecc38d2192965cb0df91c32100e1d47c714b1f845b37db37d518af326. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1856d25b-4d49-4ea6-875a-ddb12e1d5d6c.json and https://artists.proofprofile.net/proofs/artist/1856d25b-4d49-4ea6-875a-ddb12e1d5d6c.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 0xda40c7e1ef01f116ce891e4b2907eae6b41453ae1aaa60890625d1c1a86d321f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNA2361065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe747cba747ea47fbeb9ad61213c63bf4996a0b939cf956dff7090f501bc2c353. 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/QZHNA2361067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b409db4f25822c6a52bc6268bd89e84ed2567e6330cc592e840060d7b75b4e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEQ2345842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a8ffc7adad705ba4d262afcd4fa2f57003549223290bed63a691281e26b4d8. 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/QZES92483140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94147f5564d9d9f2917a623048221f6ccb22d25b54c5ab983532318b865f18b. 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/QZDQH2411782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4842990465739072a643eafbee8c5d8b0b55c09cd1cba66794d59168ea70b7. 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/QZDQH2411786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab6eab111091c9222aa52199d893f36256d8ef6ee3c6b79ac773158c8c0022c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6N2491617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde063da3a0f3b4a123995d8df3f1cba0f4d8d27fa2ed3bd7c9e8b2b5b6126bb. 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/QZDQH2441169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6513219d67a875a068995d8eb128ed843e635d2e8c52b9c22069e8d5cde2cd6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDQH2441170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c0b7ca4fc5fe81cd518c8227d288f88876307f7eee037ce7aa8527ee5fd63. 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/QZDQH2441171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0c4d3926be794732b3ced186312519688e1ab0ad1b4131d95ac71bf86ec329. 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/QZDQH2441172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a8bd8eefcfe79e38cf65b10acb55ababcc837011ccb1e93c59627ef5a1fa6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDQH2441175.