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 0x819ad24d2ee38a1a86a898aa1b79d3c1291cbb5d43c8491fe329b7ff2bbafab1. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f363fd95-5a83-4d3b-bba7-b296f58f8dd7.json and https://artists.proofprofile.net/proofs/artist/f363fd95-5a83-4d3b-bba7-b296f58f8dd7.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 0xde29df819b255f26d3ef1b44ee6842950aca09023b1ff2ac7190d5d2b3276261. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USI4R0402858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9f883a37b7831a0e0e582d3693f7643f31abcb48d076df8a4ceacdb6b3d1f3. 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/USI4R0402860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd62513241fbb26363493b20e93a963b5d04c9a9acd00a148dafd30e9ab90b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USI4R0402861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f7976a49474637dc5f03e3c5cce957303ecf90ff0e268f2c96eb0051a1ff5c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USI4R0402863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ef9f6fdb4773dfd4f4eb09d4384635f8e7da5cf664e1301bf5891fa74fcfbe. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:01Z), 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/USI4R0402865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b0362bcf858304208f3dcaad15ac59531cb25ef594732fd249533a321f9dc1. 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/USI4R1021097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0f3aff92f585c474c3060f2638244105db53bb05df180deff8cf7f5b7e61f6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USI4R1021098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17428f76d094c0ad5f05c509f8ef5c32efe7e8802231541c6419d8ff15963d20. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USI4R1021101.
Colored in Spring - From the Album "Miyabi Ii"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8860c22691608453299cd539f74e692009f4050677d56e56d3bd6da5d3eceb2. 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/USI4R1021090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87fb75717edc03acccb14ecb8a184b9c254674c4640916817494dbb250270ef. 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/USI4R1021095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6025f7d8d8dba5e106d1847150d469c77f1d16dce3de9823977d46c948fbf376. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USI4R0815822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098c8fa19eb213852b2244c4306309ea752675e6e7b1d0d29e8031adb9e4d6f0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USI4R0402862.
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 0x530326333ecefdd5ad230ae77cde7041e9dfa2266345880a5961dac48735146c. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USI4R0402570.
Courtly Elegance - From the Album "Miyabi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8000bc9af509de891599d6cb506265f7f3ba55b847720eecda64dde2903b5b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USI4R0815829.
Shower of Spring Sunlight - From the Album "Miyabi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3598277199ec9c030d68bfeffaad89aaa9994352f56ad3b647cf1f7d97e9c502. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USI4R1021134.