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 0xa5f12681fde568faa04f7f3472f7494bc110d730f23f769877c6f03cb5374a3e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0393d3d5-982e-4cdf-8c79-0c043f5d9e50.json and https://artists.proofprofile.net/proofs/artist/0393d3d5-982e-4cdf-8c79-0c043f5d9e50.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 0x2484a7e6a79f6b23dda6c095e0776789cf07203cf6136e32f4e75b2fd88557f1. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZTB22360698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c69ac0c353210a7a232452c7dda90161463c8dcbc0b5ed68efdf81ea04390b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZTB22360700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c50a6d20725826a913a7e72432b42a70dd5ece64f94c44dfbba5517110f634c. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:25:04Z), 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/QZWFP2499265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a7e3afa8e8c9f92d9ab4836a0e30056065912dbf5f17fa0476ed9dd3e3d859. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZWFP2499267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeba43a5852ffd5489837ef0449720cffbabf591aa3f378f1d41d39fa2f508b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZWFP2499269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daae54a66beeae1e1483dced6daa2147aff49a72589966113506d709a8df757. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZWFP2499270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec0882d6dc35ba49d1aea639220edc67aba87a60ab70472d98611203ca2b88c. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZWFP2499271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3978dcad71e2df7156d50c65a0c67ec11054ae965627b2848aafde611fa143ad. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFP2499272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747247d2d29f9310f64810b3183df695d91e6e47f295878a5f42c70aeb259c4e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZZ7T2468558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9e13421296ccea7b68a415e23b3adcba34bb11a609ec348036f5f21811309b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7T2484411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3222996e9da0a4a47ea4c12e724206222ab7b2a89c4a9d6c0693fde18bc624ac. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZK6L2523592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d5e5ccbc19225ff0c2814837aeb40fbf3eec58b1a4f47014e542ca0ff76e9f. 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/QZWFX2551650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19637d6ff79196c6329774aaa06918d68a9170a44cdf50c703408ab994ca452f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7N2548272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d827d7172d9d074a813b315d3227a0b7e683b069f17c2b2484ec41662661fba. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7N2548273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba0b2408d447e63735a15c85e27e26b0c9799b10a879716f463c44b11e31022. 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/QZZ7N2548274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d6b0ef9bebbd3d4375943060a16645fb8899110c79019f09ea0705f62e85a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7N2548275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961db9e91ba83caff9cc22f2d74617239c8c5f99947c3679bb0ea3f21fe6e181. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:29Z), 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/QZZ7N2548276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa255438554524fccd4cd55cd743735b20a7e5faac551505bf5a5f669798a0. 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/QZES92516881.