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 0x270c58b520fc8ec37fdc9e6d33eec8318ed871b2994f6fb2457689a08701c216. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58fa7af7-5707-429f-849c-e066692254cf.json and https://artists.proofprofile.net/proofs/artist/58fa7af7-5707-429f-849c-e066692254cf.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 0xd3657ec34c60a696a40f4f6cbb8198ac49fc03c9a0c606b98bcdb2fec2d87bd6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZN882241564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486cb0257f085b2967f38ebf02c37df6a259fa0eb74e97d91be4fc5ef97a6e00. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAT2201348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bd228cafe2ac58b787204daf0258adfc9718a32d165e6ba1ab49be2a6a853b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZYFZ2488052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b404699ad8d098b98d90e26bbba584955a1026a10dc5ba065026f1463bab986. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SKP592300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cbd9c75a29fda9047759fa5994978138c9d73e71831c265b2290f645566086. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZ662476167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc7b86e74ebb9bb07720602e8cf8980a3a627f3aac4c8a7eed3c1374bfc7da4. 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/QZZ662359951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6301494d99a37ad8149cdffa8b9b4fc7e3ed253145427edf221f5ea04613294. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZZ782452011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c0e7465198b0f5fe9e21ad8e4983bb0f0ad3d2530cdef6ac296803a3349008. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZZ782452012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6622a551074e3ed3bebd2c42f60d4ff3660e94a2884a2991e64997a56de886. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZ782452015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c1f58b2c1b23bad9602d816c5b54eb949657fba9bad15afc1c090dc68cb724. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZZ782452017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000b92e113b9be3eebab567aa9ebbcfc439d8e4a4ebbbda62ec1ebf15347ab47. 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/QZN882381586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f2c191b76601254d43e001b30ff25540000e7481f368d1fcceeaa84988571. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFS2430189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154826285490740e483cb695031cf7adfef40225819b5b81cb5fe6949a17dbab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6XW2254110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc0da348b9c6e2b1403f726422ffd3170e1955092ee09942d2218c4a4b123df. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92543735.