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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359407c18f831f3bf6b9818e9c5ffcb3996f55effaf54b674c3d8a5c5b05aa3e. 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/e06e7770-6545-4327-a089-3e173f4d0fcd.json and https://artists.proofprofile.net/proofs/artist/e06e7770-6545-4327-a089-3e173f4d0fcd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205042f65245826effeef7bf7e051122d6677d233252ca9cc6ed7bf4259adca2. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QMXZD1100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043f4947ceaec8088a36fc8ab891be38d1501689ac209a5595503f4069ab0805. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEBQ72100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19738d6b7519f4f5036d2db1619328e5a15196455b6e44e7abbc4b410efa439. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMXZD1100428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eda2f58d1f05767c88b547262cc57593453fd4d11f7581365356977b6811efd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEBQ72200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3aafc9e4068b4200df823a82694398a130670e274271de36a887eabde05aff. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEBQ72400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90b663625b82e9fcb5d1a946ad8f31c56ae1b84218b0c3da85ced54db250d70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMXZD1100770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d35b77fe43cc48f688e2d2a7bf7fca888bffbc6ad02a7f7a5e8548d45cad06. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QMXZD1100774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37a7e59ad7ffc5edf84fbd3a718fd048101a105369588a2f5d581f28f27faa4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMXZD1100772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e98bce67a41d193808e899234a8029907d553e361385477482e096e2153f0b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMXZD1100773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5b52ca09539500bdf0cb11bacfed9206b017b46c9305528349df9edcc130b0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMXZD1100777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d35b77fe43cc48f688e2d2a7bf7fca888bffbc6ad02a7f7a5e8548d45cad06. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMXZD1100774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7f24e77eb5f8e6a26c2c769372c11a906716209f8d2863a1250b48523ebf67. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMXZD1100782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710c866a03be6e27b9c65809858b1108b8226981be6ad4e67911d90ae0c958b9. 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/QMXZD1100775.
Door to the Cosmos - OntheCorner Dancefloor Sampler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74891e2e078e94f989f1721214f4eba40f30c9e13094758898e37f3ba1ff58. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEG932002323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7d7c2c0456ceda87dec3de29dab8b2651888ae45e960d2b6a33748b959a9bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEG932003176.