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 0x5c70a5376cb76c402c4c1304a0b6a8bce5311ce584a01706539937636bfaf0e9. 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/035f20f6-35f1-47b9-9a30-24097ba71a00.json and https://artists.proofprofile.net/proofs/artist/035f20f6-35f1-47b9-9a30-24097ba71a00.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 0xaa6fa1020c590aa3c029fff050e0aab39880119eb38747471e43fa4f6e4d380b. 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/BKU952300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb6ad3df2f0f05165085fc5a4e5b3892cfdfc2d2f69ea31ba8de9397a712da. 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/BXD3Q2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f8012bc46369c5a7db93ac969e92351a11b6cbc0210ad1b036f9c978d192be. 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/BXD3Q2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565eb989fd66a236b89d4f050f89a34e57267b3ebaaffb36a3448c7b5b7a6724. 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/BXD3Q2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a24a8c04a9004649bc37e68946318cc566353f77c390b42a500a172ac22efc. 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/BXD3Q2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3e2b2c445a656755aeac2f19145d9ca1d1e8549b9be3f5dfcb7f65715dc063. 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/BXD3Q2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68361c0233be14ad340e759ff4f8d830807cf6171fc427c0c6c5b50bfe6fcf8. 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/BXD3Q2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6556dffe14123444493cd17da11980378f963801e5710f5d2b844f5fb5281c8a. 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/BXD3Q2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9bbcc529bab43d64a5d37871d55aa443924ecef69aeec07aaa690906730482. 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/BKP7O2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9615b6dba21e005e87864951ca2da9fffed50fb4cee73b818a46a60b4eb4103. 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/BKP7O2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae48895ef3dc5e7c76518e6d0407c971c4632396b0fcc3c44467efdb62ceb36. 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/BKP7O2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839a45ded703568ca132377158622c117649313618eaae3df353c0ab0c19c373. 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/BKP7O2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100e64a9de86e50952e316cdb3541be7f666f3c329b8ae82321cc94c0b31e484. 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/BKP7O2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c152f4952e393782e1de6d2f277d99ecb96ec0afc78bf52465fca7438d239f8. 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/BKP7O2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6e23dbf7bafded4663327a500b2326c843540809fcbdd4da91cb83c7e7f42f. 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/BKP7O2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e936ff2cfef3edc43c58cfcf716189a79772a2f95707e31681b6f0267fc4c6c. 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/BKP7O2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e96d836020d298b445a4bfc7fd63d85dc44cfff4cee6b23bf535734320dd3b4. 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/BKP7O2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc142b5aa2fe299d5d0e64fc73024e50a914ce895f5e8a3150e0fda4e465f7a7d. 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/BKP7O2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2395a4be50fca3f6412a33fd57fac5fcef92ca5cda9d4cb8a69641b16f06c0. 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/BCIDA2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d2c1f50733191ebf43a359b58b8f8f5a7caad297d0bb8827d4d2e4bac89419. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCIDA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fbd1d4eff8789fba08f8f49ea55d4d70e558f2193062764d834f49984e89b4. 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/BCIDA2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86abc4d0e60b9508918ecd8a57116004cb5444e238f046204289a0259e3f953. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BCIDA2400005.
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 0x514eb5ec38d4e9ba2f51491b693b85eb415f45cb4c91f9b7a134e2a55d9b1ee1. 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/BXYGS2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca08519d2394f75a279ba453ffc497ce9a38ec8ae9cfba9632c17727bb397c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXYGS2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef03bb7ad51c56667932f4387fd7103ca987e871cde5ef374c3d98aef354406. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXYGS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511e83c382ff6d8c8957078e917559a142e6e1f14cff2a2264ea1355d4264a0c. 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/QZTV32475120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c4fa59d394708f48ca9419623ca2f0d95a5d708eb5f1b37a58d36eb7d7e19f. 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/QZWV32406113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22415e9a267be9d3df46b5a6e1f38b0612a23c42ad39fb3dc36963ef9e5590d1. 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/SGW502513603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de99ae8a04f7ddd296eb1c51c4fd19a43c1579a16dca97c619a73a5b4b0667b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCKAK2400004.