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 0x5c3503136ee0b6246a8aca60f5e59925eb76b53561d4c8232c41a21266fb4a49. 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/a9832521-6266-467f-ba49-f971e5a928d4.json and https://artists.proofprofile.net/proofs/artist/a9832521-6266-467f-ba49-f971e5a928d4.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 0x92b9e83a30998909ea7c33386f7d3ff2a5a79df8f3330132c372992979da00fe. 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/TCAIN2460213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5a0598ca933aa2c6835a4a8b3b30525cfed09f83e0e5670a6cafd7116fa6c0. 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/TCAIO2460251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc759e994245f20cde97e20a5224dea779bddde30e46e46bbde05153b3dee2c17. 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/TCAIN2460307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53457ffba81447772cc4edd0a63b141ecf37c4a6b18640b3472f79d060baf833. 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/TCAIO2460326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7176c9f1eeb4fea295e06d408e8327fef2c40e95009806c42636467fdaa575. 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/TCAIN2460331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2020a59fb31a8b3ed8f07e2777b9d2c62ba39a1d6f61e0ad82b80985194c262. 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/TCAIN2460338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f9cf3e30bd555f4a3d9a9f60af0a6102aaf2b258a5d1a77deb4a021b24b26f. 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/TCAIN2460344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9fa3cb6dfcec0488a93d81e06b62e54e4b8e535cf23dd07182e137eca1db9. 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/TCAIN2460350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3273408d43201354ca84adedc85879a005ac562537329cca938b9ac9fabb7de. 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/TCAIN2460354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b14ceca4aab556f03e0f4e1d2aa071b35f847451fcbe12a63a9ed632ea9af5. 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/TCAIN2460359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c453d95e1fa7a4ba47e51beeb3403e031a40256731af88e903f48992573b8a6. 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/TCAIO2460362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616f6058975f9ef8909118fc23be05b82ad237f7517c574bdb91a958ec11f932. 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/TCAIN2460371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366b52118b22c8e7342fe3196273166c485a576522be4e7d3b720a72a2227e88. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:31Z), 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/USA5W2500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be4b939cb7439579693b3817c44628d508802f62602b4eb529a9d862655e2d3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA5W2500297.