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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4423e1bea631cde2dbfea02f29d767c26fcafa225f26b2d8a102d2549f89cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b7ba77f-4aaa-4c2f-9f2e-d38435e73e5d.json and https://artists.proofprofile.net/proofs/artist/8b7ba77f-4aaa-4c2f-9f2e-d38435e73e5d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc22378e7f2be685441fc3208c86f8f473d574ac1dfd894bcbd24847ce405900. 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/SEUM72201029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec2450705701376de3f71dbbb6b39e891799af09c26d29c94cc44d530532e07. 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/SEUM72200926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028af424fbcc339e23acdddfbcaf840fbf4f22d72aaa9c43a6a7f146c132a72b. 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/SEUM72201371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75747f05bb0e522a82dce0c1aeb9b4254f4611c5fc6dd9817e9a8795125e994. 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/SEUM72201180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902c38c4e96a521f19e9c77d9f354fbfa20def764e3334f1c3b8de0f3331305e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEUM72201372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e16bf4bce49d646d465cd0ff8bce49a14f4007a27512b83b09e855bb4418c07. 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/SEUM72201178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e747cec52323898643fcbc076b44f31195eee39c8210f02439068d65ac143. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEUM72201370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead1654dedb8d6793122a54742174c6e59861a988d6e8d247a98944092fb229f. 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/SEUM72201373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afc6cfec2f7a32cc66aafd30e8f0b95e40f52e9d52c2f0d844360e337b904d9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEUM72201179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7adf35812ac1bd559f4de535f29d043ee608f6efd667dd1466de41c26579599. 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/SEUM72201181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee9b009dbd2f1ba85d985282210902661c85659c09d34f277e14463d9c5cc97. 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/SEUM72400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b678670ac6805516f52ecaf90cbf8c5107242ed8e8d603bb752d32cc381861. 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/SEUM72301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0287062810c0f80fb6eb59de0e5612fd3637d05fada65ec2f6f6539b2589fb2. 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/SEUM72300829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c932dc82dd376613ed09b1ac745802938ffc8a6ef5e67c4485d73097a8a9eb. 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/SEUM72300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e16bf4bce49d646d465cd0ff8bce49a14f4007a27512b83b09e855bb4418c07. 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/SEUM72201178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc22378e7f2be685441fc3208c86f8f473d574ac1dfd894bcbd24847ce405900. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEUM72201029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec2450705701376de3f71dbbb6b39e891799af09c26d29c94cc44d530532e07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEUM72200926.