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 0x764a5b4de858e72b9a2d7621863b866061a7c26233d01e081fdbf410b14e8cad. 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/0904c915-a1a5-4d6b-90b1-1df81bfa3f4b.json and https://artists.proofprofile.net/proofs/artist/0904c915-a1a5-4d6b-90b1-1df81bfa3f4b.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 0x3d7abe132bc72e86e3380f9c90127332f6ad9d0262eff62112a8af21e8489320. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:40:27Z), 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/QZTAU2251538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb0af5adf6e1c7279afa31a784f8401b9fcbe4076a2a1e7e3863a664163d21c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZMEM2244222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dc79d3369f2e395f734a526f77cfe0afec0aabf12218510597bcba3f00dc1f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAU2250913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0334b7edcf829e75062bc8a0ad94ae79c86af3157894a5ff3080cadebd54f9. 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/QZTAY2240342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd2027a89123155deb8b0900434465d682f567e04e24daf8a741eddc55e3ae4. 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/QZTB32285515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86f1ab2fb193b1883e59f58876c1c342a6cb8737ec481536a72c6831ccca420. 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/QZFYX2392321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74004b28e952bf80c273961a4aa549a52a1135cb34681130efa17a2c6131b3bc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES52323529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7813f7a4a08e31a2adc220fb8d73768a43b2cff2a5674538cb10bf64945aadc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES92316927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52ffad24936dfe3acf5815a0747695d6de49eb4c6ff5f80990db322abe1c1b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:51Z), 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/QZMEP2383790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bb052f8420406b4637ccb088dd76e41cb8db165c86e054cf6840f46f253f19. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:16Z), 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/QZMEP2383791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce684b1229d3957690fa24b6ad39b0bc531c35ca29dee276724a34a842b51ca. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEP2383793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0150622bcee1e28fde1bcd301bc106acae09873d44a954217ca23075e9ffdf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEP2383798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7230bbc39a5d14418e453e9e3d1a587d7b742fa0b050452ad933887e03f45c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMEP2383799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c839b9106089bb02d9c41f4c8344d0ba5e5c11f783ee41ffa504dc1e3ce2ce4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFF2422392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e5735cfea425858e1577d4388eb35f157506397e8b43ac51b78723aa20c514. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFF2422394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2808cf00480ab64c861f3d3fea9676e9c126304c404b9457453b4d678c170496. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFF2422395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda75a4eee53de917aa5e416275660d249b5a6fbbe4ba0fd90b347562f44b60a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFF2422396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b0ae3070e92336a2144ede042ebdb4e582b2188fe35ca121df6f1a2829ab1e. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZWFF2422398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc738b36ef5dc6b4b3d5dfe2af36db981bfb81bb34d589dfcdf062525805c621b. 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/QZWFJ2419881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4dfae214e0a8376468c3ab5c51eb7a2fb54ed9b9bf1702ed4939d09d7c60e9. 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/QZZ7L2532265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e9b5a89bd3a65d19d2fdac9bfcb06bed918a9a39dc8d6c1591702232717a90. 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/QT3EY2588497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd27abe03055916db341838928db7a061e7f1ff3f2f5b313ff4e0fe1c8b768bb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:50Z), 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/QT3FD2585091.