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 0x2f702ee616c6afb8667dc5115f0bde1c941dc0fb506d71787ca7397f88c76f1e. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f963536-d7d9-4bae-836b-b82674da2ada.json and https://artists.proofprofile.net/proofs/artist/3f963536-d7d9-4bae-836b-b82674da2ada.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 0xf21be423d682358294ca0cfc5b91a1d3f867629695a4365ee4309fa756eaf871. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZRP52488459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409210bbb5490ad9df9a69029b36d19441c8ebaa3df817130ab3f741000d2587. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZRP52488460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf9c63bdc23cd3b3dc4ba15e0c8a9682a4491481a27974c60db1edd6992d6d5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZRP52488461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f73cc382125993b296ca97f822fa4c6aa4c345860793bebff0d6a004a070122. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZRP52488462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b83a482076b9a47de208759b71756ee03b5f49f9830f491a76d7836d8eb8bf4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZRP52488463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f59eb6352c8ce99ba6364f53e430303c61e9680af8e82ff0d1b1505f933c7eb. 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/QZRP52488464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c153b59612c1e6c8a86a0d0a1fb9627822bd101b20e74984145ded9319bee. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:13Z), 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/QZRP52488465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a0b42cacca172f481b59abfafff028348a9d9db5cf54b23bc00c1725f09ca2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP52488466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4b48b6d49aa90e58988a1fb7a795b874c4ffcdd260573679d3c918d750af76. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZRP52488467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf66f98b748124cf917de16fb79086ab04d6dbf2ffb52b6a249bdaad68bc553. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZRP52488468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87fc0cff758cfa84d1eb16f6d694909b4cb65adcc828bd11d59a8dc006e739f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZRP52488469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafc4de3a0bc56a6321c27743e5dbadbddadf9ce2fc25bc30ebbc8fc3c6b388a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:35:07Z), 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/QZRP52488470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a715e5dec8857fae8126e41c7399b03089074af184d0e9d1d7fb189008d99. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFU2422405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e870f07e667a405d122a9efb170fb4868717630db37ffdc14107cebd9f3b11d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFF2518543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0338413f7cfc50a920a0011c48d17fff65ab4cbc20d388291c746c21e30cf5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFF2518546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6478794d2dffc8a3d8247a63d7863320150981251fa0e4f9de0dd8045196918. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZWFF2518548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42364234aea96f886e94c767240db33d1449f322c963f51ff0004a87c3b463f0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFF2518550.