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 0xbf0073968928ad21a3f3922767e5e585456ee4bef6c085aba4e417a999f5ba9e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3e49398-fab0-43bd-b556-dd4419521c53.json and https://artists.proofprofile.net/proofs/artist/d3e49398-fab0-43bd-b556-dd4419521c53.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 0x5d49738c057fe02cb6feaa7097a17e4548c9be03be35d7b2b39a3377f495079c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZMEM2442649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93de8f847d8688ab624ba7cfb8464164366914d6bc3b45c2fa43d278c7f2cbd5. 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/QZWFJ2448905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26828c577c1a4511b9649e305cc6e9a6f1800fa6944272a7e35341e00ad81260. 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/QZWFJ2448906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5793e3a8a728286d04ab0bf17b9a4a1f23535925ad7492973b8e36ec4fd8322c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:32:01Z), 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/QZWFJ2448907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf2d585a5ff1cf1044e6308555e147d25a2732d9ac2067e27878b8aa60f8c1f. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:48Z), 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/QZWFJ2448908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ff4cc6c4465013f68b504782327a445777f0938727892441b20bfd1f95b18. 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/QZWFJ2448909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389e2a2894ad89d243128d6254e50337fbef570b586f3d0b1e0ba96c5b8118f9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:30Z), 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/QZWFR2403289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb21b350f08cb300fd4afd31233b70a171f6ebc7e351ba19ac433b62f7d219e7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZWFR2403290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f51f5f1498e1317344b34db7e539780e1b654488013e23e00ffab5d2ccf22ee. 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/QZWFR2403291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5793e3a8a728286d04ab0bf17b9a4a1f23535925ad7492973b8e36ec4fd8322c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZWFJ2448907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e8031b658ab2118b6a5de4a831ba44afae4528b1a7f34ccdaf5a440d99e1cd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFR2403293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed99fabda5ec13599905279ea6f1a6780e76b53ca88295fe6544a8b8429962. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:28:03Z), 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/QZWFR2403294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2710ce1a54e03dd34009d2435dd26a41b90775dffdf0938976389cd0c7b39dce. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFR2403295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c91a2d375f77041f7beeb6179979a29153bbe79debb6aa7ab425eed1060ef60. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:32Z), 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/QZWFR2403296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d131949ee0a07a4a706660e93054ae0d43e64aa6e3ef643605d9de99364fb21. 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/QZWFR2403297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123816c18a53dd395287470eb4970ebb7ef8e6c169dbf31daa54916d9eef9714. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:14Z), 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/QZZ7Q2448734.