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 0x432543b0aee74d69803814b57f1803a3fee9d37849873f1f9a72437add149f21. 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/d1eacfcd-6114-4481-8e04-5fff4f8e901f.json and https://artists.proofprofile.net/proofs/artist/d1eacfcd-6114-4481-8e04-5fff4f8e901f.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 0xc60784d0f48f5784ab8e9ec8d73e2a83448db8b0b931c64b3545b99792218d51. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ31970431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa771cb19acdfe14617fa5e4be7649f9370dc74f674bada18b1993cd6aabe6b93. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ31970432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe961251f74b904983269ef54d3fe85c71dd565587aaa8a1de5da36e8d01916. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:33Z), 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/QZDA52051037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b26f5b8e8590b685e061c04b5b2814f4aef47621d8a837a69e0a8ff26c7b9d. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/QZTAS2155583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddb4d5b84245e8d9c173bd8c46a9eff858e9a9d9e132f5ae2ea1df8e8e3074a. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZTAS2155584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ced120fc39de61359dfbf7e6814461b54247aac74abce4ec5adcf12278273a. 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/QZTAS2155585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f5165b8a9b0797f505abd996d02d97c7080b58fff83267231b879e6e5b6171. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTAS2155586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1ff12f76deff65fe8bc66e83b00961cdb46677f1578a64d6ac26eea5d7e1ab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAS2155587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0a5efc93c800cab79e53941024bc20ba5c47772382adbe345fb3d1606b4242. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:56Z), 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/QZNWQ2182279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab72a76c8f75aea2da22dd1f05602188f740b3220689a1003d5bdf4063004e1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:47Z), 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/QZTAS2155588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab09fa0d03125c6d81d590e6b0bae393fd759a7ebcc10797f4090da82578e80f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA52303284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045eac6104a4022dc8ff826e4ac1bb45c60231f6f7ab2a70ba7f71008dc7a7b2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNWQ2580639.