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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ba3358995a952cfe13eee9a88972b7bb9def0580b0b4387a0ddea9604356a3. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20bff129-00d9-4bf5-9106-5e78f9607421.json and https://artists.proofprofile.net/proofs/artist/20bff129-00d9-4bf5-9106-5e78f9607421.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869957ea2c1590f01a613ca6de277a889b98f8cb2fb50cff038d2dd9dfd4a672. 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/PLB822200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b65e856ef360e6e39ee073a9c9f4b19b0db9440906c494960b6b2c568c4f5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLB822200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d2f24aecd9e54636147e50106f214e66f485c0367da0e69180b7673bf856c3. 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/PLB822200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb69f35e5a6ce1c3e34aed4f179a471c6cb1c77350a959dbd72d233dfd3ec7d. 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/PLB822200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3252030c7d88b6553ab08f77bc16d0810652940789ec77705335d38697d0ed. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/PLB822200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebbd51b1792d9139c386dc3c513df2cd066c8c9762777192d29b7b29cbc7549. 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/PLB822200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998ede2153e25a94ac9e3693e96db1aa77fe01ae6681b349345b073442a1d2f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLB822200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe083f2650c4fdf0ada69f7b73cbf39603663c6adb34084de1c665b00e459ac17. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/PLB822200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f42c1dfe58cc11b56a089c1fcb13fdc9f9e4d943fad6565ee088d811920658f. 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/PLB822200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b410fb6f1d5c71fc45198c16c5d81738c2d429d555cfe10df950b728f9a3688. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLB822200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bbdb28b50831e1a38c37dba6a013992b316d6b4815c1ba563f564a2bb70642. 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/PLB822200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c17be9da681a32700cbb86a73f8e451f7f9bfbc0fcea8414b7e667434865812. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/PLB822200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316eb462fef77610efd879025ecf1a96d0261169a206479bc33e16a4ea03add1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLB822200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe69b0f23bb1106b89fdc4bf3e82525ee696de2c4e557321ab7215af1d8a55bf. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/PLB822200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d11788ddd66e19c910b33015046ccb3888d111d10502444dd1eecb9c0cd6c6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLB822200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93aa7defaf699647befc5640c070a91a1eec97c0198b2e5fc52c9fc78d66de9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLB822200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfba8b5169fa2844b33a2375c0d4abccb461de890ad0da49457a0ff1a1930dbc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLK861600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cda8c415259387bac324b0b81e360c8ae0a70662360a686ec5032e93784946. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLK861600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36309d61da9d295fbbce8974530fda70533598ee40878c92a4ea9474e39c2ed. 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/PLK861600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb69f35e5a6ce1c3e34aed4f179a471c6cb1c77350a959dbd72d233dfd3ec7d. 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/PLB822200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998ede2153e25a94ac9e3693e96db1aa77fe01ae6681b349345b073442a1d2f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/PLB822200054.