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 0x76ea5e344f525173c6e8b41d7d323f86452ea63508f645799bb6c43ba88713c7. 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/84020079-14e9-4b0b-83a3-7213c46b21d9.json and https://artists.proofprofile.net/proofs/artist/84020079-14e9-4b0b-83a3-7213c46b21d9.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 0x7b3d42d169909094bf4607281a7daea13ba4a1d124571ee3b10d60a82b8ec8a8. 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/ARIXB2500689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193883cadc353c9b8b578f585e83a9a17de9e5ece9080f0538614e08c50b0c75. 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/ARIXB2402514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63cd0a5a09f78bcd967d89c14c6c813984c6271c5dfb78e47bb5e3a4014a100. 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/ARIXB2402527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecc3205ee5b3c5bd3cf1a88d2206a4765a3886d302f7148f2f14e75ac1a8341. 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/ARIXB2402531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fd599ea7af20e8021f8638f3bbc935a91619fec1df7e12a502e3fee2f225dd. 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/ARIXB2401901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6770bdb06f2a47075669887bd9e0f5d97bb6c17de7fce3294634f5a0e0e849. 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/ARIXB2401903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d3ed80c51080e03ad186f41db75b41c8a3fdac4d51cde2e9400ee61394611. 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/ARIXB2401906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e0d5dc0440f410e3cffbfccf2a16d99c8f046c78d2568ae9c4e158506a90b5. 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/ARIXB2401907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96f64972b52f6c882535e289a1caedb23f5571111edab6551927230ccba2d0a. 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/ARIXB2401910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00417dec82bac04a0f6c9eaa56968e7c38a837393b79b391c808be9de931e683. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ARIXB2401911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b40f7c96a03e17296cd612a31bd68b794ff11bb289abbc2a6a68a79446dbafd. 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/ARIXB2401913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a96525c2a4e8d945a7bd0a0cc8a669d26ca609b2ed9f11829416cbf2c4d594. 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/ARIXB2401917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193883cadc353c9b8b578f585e83a9a17de9e5ece9080f0538614e08c50b0c75. 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/ARIXB2402514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef72ad23abdf649669d3ecd51bdf49f5f539620c5e28a0940f75179aaa6333f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARIXB2402528.
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 0x35263db6e0eb5b9744e9faf037ac4c79bbb7bbfe2ea279b827df870a4eee09bc. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ARIXB2402532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e534d39982a723abacf1770426925e70441ad8685ccc1681e03dac80583dc1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARIXB2401900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79833f086e809eeb875f50d9f44c554e1ef8b1e60f05f34edc44a8109b522f9. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/ARIXB2401914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5eaaa0f9f02985bb16ebfc0ce889199c43750d36416dd4b694b41e14eb6e45. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARIXB2401915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa702b2a81d85b112338184e700ba551ead01e48a88efe7ff36d03ee51f5353b9. 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/ARIXB2401916.