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 0x1c02a707bf8b185d9a96c93595e6a7756a0efa7ffe8ea0fb5ef3d0fb0a1c1204. 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/253e0ad8-0b54-42d3-845b-a3faa04cc62f.json and https://artists.proofprofile.net/proofs/artist/253e0ad8-0b54-42d3-845b-a3faa04cc62f.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 0x6664776c1bcb448c97982b551bd6db3d805b9404c712f06f2e4b0c210f11d3bc. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:39:29Z), 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/USUM70605256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81256f6410f0d27ca489c3cbe5f054b2b02157dc4b61cdf330fc2e7de60e3ab. 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/USUM70951583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf4940c18bcb95be70bb563b711c1144f397e0779d5d42f9a57095db4c0e884. 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/USUM50411247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10993b9fd190143e88052c602756954aa2688bcafc1b5a2bc7e814d8d5a4a7f0. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USUM50411253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263ebe99a4178e1e999527dc4d2c810628cece3d67335150e5364586d141af45. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USUM50411256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495ad11feb266784b6a27daafdb68bdcd09fdd861d6fa9547f3a1b84747641c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:17Z), 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/QMFME2127183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb93e7050a9fbac10b7af0a4e085608cc70473c3a81a15f1375c5febb633a3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZMWW2225593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69bb4221d7baa8dc4a3cd16ff6327a37adfa71ec8af13ad8de8e739ce5f079b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:01Z), 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/QMBZ92261381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da45867064ac99563c3b0b51236715c30f627edbc8e622b04e273f14e7b57d3. 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/QZMEV2394998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e05ea3a4d365e469353c93ecb7453707bb2edbbfa5df35209b1402ab56afac7. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZPEW2412646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436509935b126b5686b286cc283db58effc416a504c2def38add83b56bad6cca. 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/QZPEW2412647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeec53492347e9297d4b52a9bba5a968aa0f54eb069af2cc82755d6da2f3aeb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPEW2412648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a36f88106d116a7075e9c763bc3f077d3f5cc97dc274e3451efc8012599031c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/GBWUL2483913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445708f0605f7e903453db5756192559222a97d3aebcaa79d87301c5889b2230. 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/QZPEW2520473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241e293f52e3a71be7e17ea56b00093696ac928ad9f22999657992785ddf5647. 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/QZPEW2520475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bbc76982bc35a616d05c03c54472404780fb72a61c9c568597beeb550dd931. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPEW2520478.