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 0xb7963fb8324ab7001b9000d37ff5695d16a6afa4cf08a8e04e284aafc78c51ab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c329d7f6-d568-4676-b961-5ec59238c842.json and https://artists.proofprofile.net/proofs/artist/c329d7f6-d568-4676-b961-5ec59238c842.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 0xf2528dd0f5a14cd4914bd2486f19d526043534ccd3fe25ee9c7a9741388aa192. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6L2418621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40afc57bee20f9638010fd47c5a6e6d0300aa3bf55da9054fdf94ac5ddc3c51. 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/QZK6L2406115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80ee97816f82a74e1554f1676923deab35777644f95126226253abbea840051. 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/QZK6L2411034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3ec7c7e7c8ee449c204dda1c49bf052f5dff7dcd9a272cbafe6a4f6c304875. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:03Z), 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/QZK6L2422087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916caf1656f963393f2d3d3dac94d3c195911da2c981be032602d38e3407b22e. 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/QZK6L2420920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea034ad8b954ae9b3d3e4fad1b074df0b42bf0d599522eea60ce4522aa1717cf. 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/QZK6L2449281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ebcee6232a1ffe6ef3949b3b02356d3ab0676ea10fbdeb71d4b5fd573f2bc5. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTAZ2461171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf590969125ed2f4954e4b86182b47fe024be729063512ea3832cac7759e369fa. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZTAZ2461170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af84b108c4e0b050a8651381589f58f35eb9c0d1129548386324e8d12be5fd. 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/QZTAZ2461151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fdfbce0e5b1b431ef0c18a4fd3d7d950892e3852efcd3fbb35fb19941dba61. 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/QZTAZ2461213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d882c4b2fc3aebfc3165c8daf9a9f35547c2db59ad7b174a0d4abfc8d5e40a. 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/QZTAZ2461169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3f2ac37e72da13cb6c5ac30342eaafeb3cc05af80124c75a444df737ea3a6a. 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/QZTAZ2461174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b9ea4593c8854c644f317bc530780a4271319875db4a07c925fad08bf9c55f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAZ2461152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8091c73b5e45e8bf3d6a0af052f95c5a27acafc0b5bd3cbd0706b8f77a82dd6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTBF2479727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc04813631a38253a78739cea2b329297e7f107e0891e9674e1254c5af181493. 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/QZTBF2479730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9726ad9cc0550588b0564c0a39ded46009d2b2150d1cdeb91db6906ce1b47fc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:03Z), 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/QZZ7L2593180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fac0752f7c9ae773e08e0e100ecbca3b790a2bc8dae1308cc81debf739c790. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:57Z), 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/QZNWR2500998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f54eab11c2a975e910ff754cf032fb78bd65eecec1bfe8901a533bc059ec11b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:38Z), 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/QZNWR2500995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600199b8233ddac59a9eae5472c0bc2c6505658a64e1bf677d83c0dadc7a612. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3F92508733.