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 0xf619114ef9cbd3bd2ac54f883c3cc7d139a03d3bcf5cf2931880851dcef91ab4. 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/6301e21c-7db8-44a0-852d-6b94801c5ab4.json and https://artists.proofprofile.net/proofs/artist/6301e21c-7db8-44a0-852d-6b94801c5ab4.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 0xefaf3ba37d4aabaf5934d5fb01ef7f94f7cc00d8a041831c9b8bdcce82409ddf. 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/QZHZ32178906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde812bc96a876c1f679c56dccb0c3448aba54221933be50c056a0341a34f29c4. 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/QZHZ32178911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6602c8a95dcf500025ab3300089bf1bc9faa5b2ac22dc5de2b04fa8767dde94. 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/QZHZ32178903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074dec1738781953c91312c5078e0b89275fce59c8f644354a39fe4abc2fecf2. 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/QZHZ32178901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e02e974aac1d07d7d82ec1f7100b77012b35bf3cccada5e763df1313eb59606. 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/QZHZ32178905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52e0ea21ee4d1b2c686b5a207ae549552d40220cd53db12f3f6822179c67997. 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/QZHZ32178904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bf60d37d99c3000ceae572a47d6c184ce9e52bd1641ce5db103b4f94dd726b. 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/QZHZ32178908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcb2fd9e1856f2cc7e53f85ec40f95b42fa93d04446d8e0b2d1f41383fcbda2. 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/QZHZ32178909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d55ed4a78bb02cf2066946359eceda1c516587a276da2c778685bc99218c011. 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/QZHZ32178910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a8a9194d46fc399a83fcb26f0e4826c7ea04035360280aac1ad3f6a57f6aa7. 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/QZHZ32178902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec17440e6fdf129bbe49962eec88a0a1fceaedb406609e1f329378cb328c7dd. 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/ES71G1912935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d13158664c9af21b908285fc8377beda91dcafab68659d26ff5819760b6518. 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/ES71G1912932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7833448f7e70d7b4bda4154ab93dcc5847331b210821eaf115670ca31ff36a8. 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/ES71G1912934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c33514638d07fc36e06c716fbf0d604cdd94094d56180d4b239a273b26237. 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/ES71G1912939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba1ba60d4d9bb0c9fe61194b4f97a0d24c83ebeff96027733ff929c67e49355. 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/ES71G1912933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe958ae850a4b1d233e6ed633ac44f573747d08624c6a8c179eadfced84e4e4e8. 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/ES71G1912936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1693ffa3f66f1130b9df1074e59498513f7d382c7d315bcb64338f6c360744. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES71G1912931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7041d6e65853b3dc38dc2a6cfb83e04783696ca4de6f6a04b8c92807898e670e. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ES71G1912930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07662e06c8b004b66a7821574a00ec587bc6e10d6255c01e60ec5f9a9f12b59d. 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/ES71G1912937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1bb795ba8739bb941d778aed3f025103c993fff4c75aa26102207fffd86341. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES71G1912938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dd25334fd55b56933c94cbf7b24865b367b667b35b4e33096a099f85efff06. 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/QZNJY2353650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71e32eab204f25f1512576cbf3ddd10c38d4979ea9bd1abb9d92973a3abdff6. 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/QZNJZ2134923.