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 0xf3b057c5c32443a5ff922f82bf782ca033acd6b72cb9868c717fc84fb66cb14a. 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/842c321b-d0c0-4ce3-b153-f800c02fdd52.json and https://artists.proofprofile.net/proofs/artist/842c321b-d0c0-4ce3-b153-f800c02fdd52.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 0xc527cc20b7b0b92e7d6a08532d381f206e01cef2143f4312b587cefc39e39640. 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/FR9W12113144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9777ec0bd515160cb1373ebaa13940aeda1c1f801f7304a9caa62ba2aadb29fe. 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/GBKQU2482016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e115d63d89a3173bb9b71565c8ce93f4ef0954a0a99102fdc8c8d0e6a784516. 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/GBKQU2431578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf06409c9dcf8517b5ffb977a0e191c2f5a3f3eeb62531666fe2fcfdce2c84f4. 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/GBKQU2444344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5572ac1952f7f95640d6d1914af843721665ed8191e2cc2435ad95c7577b14. 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/GBKQU2482017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c16a3c243525748d9d6bd7202da68a66309814f5358cd1d8f9e1394dda6b9. 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/GBKQU2346107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a592ceddc181d789015a12d3a92ad13f5fd672d576498f212f0b8d1387e21f. 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/GBKQU2482018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41581f3ee408789b77df27461c6777c6dbd37d9ef203fb6289ca0f8315ea590. 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/GBKQU2482019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd593951ddee4c4e4b14977984a3d797729d6f49ec2b49427b5d45fcb14716d65. 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/GBKQU2482020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c85ee1163c67425f26b39e8567b2a478aa3aa1db5cd50ef8795a86f0cf1cbd. 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/GBKQU2482021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720e1e89eeff9c7783bd66d52822a502e0e24ced8130522d1f4663c1f451356. 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/GBKQU2411427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594c38c032ad4a446e0d7ec0b1a723248f0dfb14e1752b65f590d42b4d91eab2. 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/GBKQU2421294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d8cd32cc9f9cc2597d2afeeef92e660ec934014ecb3223296064557b1639b. 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/GBKQU2482022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efe1652f7b420e2e9b258567c4d1d257e602bb47377de5752b79ca3cd334f27. 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/GBKQU2460121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596b8c79183bc3429ad1346b092a90e6424ab6934b49ae50761f3e02deb5698. 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/TCAHC2362954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb379c6f20dd8b7064580b78aecbd5a7da8bbaac3821f9d952bcbb7e60be49f70. 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/TCAGY2336953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3ff33990cb027737a5dd8e6403b65707cda9efc76a8dbb09f39bea29302859. 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/FR9W12221377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a077658e7ac8944fcbdf3d02525cdafac79786be52175d752bab63ed814d0a. 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/FR9W12113137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb750df16bd3fce4026a0df03b4ffab95990ae0c9b0343fefd15157462591dd25. 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/FR9W12113157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0574c27b49607fdbd1086ced179da2e127c41ad92e742c5f4c29084706c62678. 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/CA5KR2044244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0131aaeb1a29bf190c98fe905c6655c5454145cc1e8c50b85dcc46ca9d4941e. 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/ITXDW2000899.