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 0x3e254be8c61daf647865f9f5201dacbdef247ec186968f4eac2c55cc31aa628a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a6e6ffc-17e6-4612-be8e-e01dc80e5afa.json and https://artists.proofprofile.net/proofs/artist/9a6e6ffc-17e6-4612-be8e-e01dc80e5afa.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 0xd2e68582c8c5a05e345145b5772dbd23fe59429baaba8ab790c43b4a922e609e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBA0841930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b63eccf2648a1f6410b2408b9e89ea677ca450e5bbe1d44d84c81b19d78881a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBBA0841960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db51720683ae17861b4ea69f811da8516816f0674bda825af404301fa1820ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBBBA0841870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bb13da4277ca1729457d1a92c188b8c46bd06cbded573d12930e9fdbe58603. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBA0841900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a73e5c2402c69c1608b2e73331abd3d8d26b0d77c6f8961340db87bea5be5b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBBA0841950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b48193f6df65b793cdc794c3418bae39bc486d528566b128ab7defe37786712. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBBBA0841830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d9c1ae1aca9bbd5a22a71105201a046c03500d1795b1fccbad6f6e0c615778. 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/GBBBA0841860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374b17f2d10c45372d4a1031660aae22ab6e2b3656d080e059609dc0d14f634b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBBA0841940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40adb36ccafe85b9d44afa161656844c8dd65b29254dba99c4b3d01e2701c55a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBBA0841820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c5558447d0c9cd5ae5788760384cda101277e63ada658968a2e67e97762986. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBA0841980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c70d24bff02bf169c451968069fd135c8074e031d54fe451df1ab84c388e0d. 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/GBBBA0841840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae63f7273e402ee53b84e69286e50098989f3ef978110bb8df19538666d952c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBBBA0841810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9afd67e1e7d2e8af09ddff1752d2a5b45866fa06e608f997cd0c3fdd8fcf40. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBBA0841910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a9f89214cf30729a36b91a20b4b079649c9dbfac2a4f04588e85ebb1f75a8c. 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/GBBBA0841970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae63f7273e402ee53b84e69286e50098989f3ef978110bb8df19538666d952c. 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/GBBBA0841810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374b17f2d10c45372d4a1031660aae22ab6e2b3656d080e059609dc0d14f634b. 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/GBBBA0841940.