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 0x85a0a54d0e57ac4f9bcb44e0b45f9cc1097cdce3b84783d2a171773355fbe844. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1b5346e-c50f-4ff5-95b4-85e331ca221e.json and https://artists.proofprofile.net/proofs/artist/e1b5346e-c50f-4ff5-95b4-85e331ca221e.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 0xa9e46dedd3b57ec741bb23a28dae344e9f3ceb73a59dbe4c6da07af542590974. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GBMJG2434502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f2155296784676ca02e3cb6704b8c51292c172d2d3aa6f82847d8308b9808a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBMJG2507955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63c0c42acf86cdf97c08365d8343100b4dd5b230d8bf2e0e735a5cd44fecaa7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMJG2507956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c95cc1c0cbb50092b6ce21db7795cda020daa7baa1f3d57fa055feb62152c6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMJG2507957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ebd5a70c54c2657e8b03c311e9f9774a802a14e41530346dd04993c6f15f4d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBMJG2507958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef54873deb677deaab202999e2df89adc50a585cc7d5e62ce0948c85968b6b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMJG2507959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7114e096029195a4b96a9693f7f54aad6d1ecec5e790216a6695a8220769d1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBMJG2507960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa8669d7e73ea79d224e50250a765a81f7c64a10f8f399a315bec19a7079d14. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMJG2527199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e5ecc45a8bbe73114144ea496300f882d136734cf7f22426c331adb17d6782. 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/GBMJG2527200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb228cb4dbc1cedd613f24df5bf5bd5b0e514274ea106a5b3397d792a9981e4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBMJG2527201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ba99d362d87c10e9f3ad64a9fcf75bcec50650ecff464e66776190ecff2e77. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBMJG2527202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8f72231e75363c0a355c03b71693a34c6a19778e78c97ab7e335dd9a8fd252. 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/GBMJG2527203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5724fcd94e168d13e1b60034a7c5bbef5fad17715cbfd7d2e5c7be12f14e38f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMJG2527204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5e0a6971bc3132a0a2ae508fe9d3a55a38f83475547bb8b6d212b1e6a2c3fd. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBMJG2527205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aadc41df3cf73ea9b528ce2ee3233b2ab929c46d0b3c06ebf1f1978efa5bde. 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/GBMJG2527206.