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 0x82bda0c16643e3814a255e05365daa5bcff39c7dba357c068f9e85651aacf0aa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/825317ad-cbf3-4ee9-8eca-a9ebbe21c376.json and https://artists.proofprofile.net/proofs/artist/825317ad-cbf3-4ee9-8eca-a9ebbe21c376.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 0x3a1a914380959d67e9de8a2c0445bed9408d528d7d4b8bb98c2777882aa14645. 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/CA5KR2380443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a0db006cc7c26aabdc5b23bd846c089afad07222eeafa59437672883ea1ea5. 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/GBPWR2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157d284a7a5e3728fc2fb9163297dcd09083b06cfac032f4746e8194b5de6a44. 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/FRIDO2113756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c690347d375b9f89c3c77a1b822a70155f5f27b4043d78387a23ce16f7cc2bd. 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/CA5KR2047187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7b311b4b3ddfd861f701a59fcb9fb39b717ae1377b833cbdea1463129927e. 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/CA5KR2047188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a53e0bf1db4683079f57470f1075e75b809a8d8fbebe3567916c789b7e5c18a. 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/DEAR42032243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2b495bef6b888cc7d83fbbb109f57bddc9b087da84d04d61fb58964ed0bbfc. 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/DEAR42032583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb080258ce45bc5956ea3733137513b3fe2dae861509fa81e6ad1a40222b3c2. 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/CA5KR2001807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e1a59f6f61464cc50023a26692129e0fad6ba8a6863c67fa88ab0ebecff541. 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/CA5KR2001808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13e77ef34f83c9ac85f3c2b1c8d081aa4fc500224287a8e27a058c78f2cbbd. 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/FRIDO1911594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5997bef12fa7dbd61ebfc88ab53eb52c317a06de2d7ef5410900be356b61457. 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/UKFTL1600125.
Let Surround This Planet / The Primal Source
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65c3ea7f942666810b9af9bb098fe29ce3adf2caaf1b28148d1d6764d531090. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2063353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6277d19a118418119426ed4dfecf40e2410ef9137c6f1d637ba22ed35e5beea. 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/CA5KR2063357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59607b3f1704000d1bd8b2c5115fee65b9808921eb3fdc154fe0d84776d8b7c2. 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/FRIDO2411937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f6f4cf73a6648e3c419a3717e735778e664c8f71bcb8d7354748da4a50214. 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/FRIDO2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921e0b12f2ea0d572cc04db63236ac9583cdb3f6c022e1124fdb2e3c613111b8. 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/FRIDO2210020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de9ebca69cff8c7734c07381c742511d3d88944cf57f3c2bae6871748a5e49e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:32Z), 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/FRIDO2413510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbe52b67b0c93d32f182eadf49fa9aeaaab4ac2d76c57d3863e52d65249beff. 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/DEAR41948173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7976bedad28595638269ba8257e165dc3574b7b5364291548484c5c8ee9fdee. 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/DEAR41964109.