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 0x4425b380ac95aa92eb98e69f249edb5119d6da72045dd4345a7208242c8f012d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaa5dd0b-7d92-450e-a178-0eef5fee9d0c.json and https://artists.proofprofile.net/proofs/artist/eaa5dd0b-7d92-450e-a178-0eef5fee9d0c.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 0x567747f2bd203fdf4603257a9f9a5c84150ae6f20966ae46fece023247031567. 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/QZES92121795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f0cec99cd0614be897dbd01d0021cc6780938a2885c091b157437399a6dd6b. 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/QZES92121796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9b6cb81cbcad7e9b984a5cca83ce1f2aae9ca2dd94e7b41f6d9f2c36cf435f. 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/QZES92121797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b9c81eaaab95690923f87516ef4bbe0c9f7ddf50db419e8b66c0ddb3b21b8. 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/QZES92121798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8c98f61639c5558ba5fcd7a02ed8b7daa1f5c68ba11cbfbaacfb535c5b5a28. 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/QZES92121799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca180637d094be5cd64dcc5fc390a3849f0b1450c5af3d06b9663119b70b3c22. 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/QZES92121800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf659b3f16c9767c1e1bb267bbea1204ec4b0e6fe4f24ced68c691f29ddc596b. 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/QZES92121801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d38567024e935d0b65dd7f60dba87bd400d68281696c6f363e180f3700fd5d9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZES92121802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec5b9526da1ae8c33977320e4892dadf87962f73bf8c4f153743ab11578fe4. 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/QZES92121804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33530d431c7351a8fd6851a213c81f2d221cd46dda61c35ced1fefe958d54d62. 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/QZES92121805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c29da2ba611d6b822fd3f2ed4c239808e5724948fc7bc953ebdde703e94c35. 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/QZES92121806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bce24363916900d4f167e76d58f7e62151dc313d6a5aa6e3ee94fe3977c0a92. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM4TW2413914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636895af0ef69676716f6f6b59896a235fd6e1870defc7b0d7bf07d3b6598f07. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USUG12501971.