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 0x84a7e997abe7b39806eeaf4b9bbcc82f76168ef1aea2d9ce6bea2657391ea25f. 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/611d65aa-a0c0-4bb8-9a67-449039fa79b9.json and https://artists.proofprofile.net/proofs/artist/611d65aa-a0c0-4bb8-9a67-449039fa79b9.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 0x1489a5aba791b1b48ff933f6f565700bf8e43c4ca1a341d3c268738c07095ce7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMTND1100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c607221a52440ecb3a7ecb38af8cca371a6e4052f8e260972c349ed49f89be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMTND1100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759732479b02af852841f8cd848b51daa552769325eb0638c7512dee1a02d6d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMTND1100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2432228d45952477c5cfff3e748faf25d27514adc922c16f69fea788b0f4e179. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMTND1101199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eece46696a50dddfb8116c913253b421369a2dadae38838e67233cce7ff114. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1101200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91868cc563054923d182f69e94d78596ca231509a3cc9e359b749ac7c6607776. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dc88c9b4fbf2788153ee3b6395b801c141badc1b9f4aae561b20ba8cb4f894. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2ee22d46934a65f7311d6f622bdb7d5cd03f5d71a2e21f08024c0bc57f285. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMTND1101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d627e5b9f9e141a0c8df0fa8af2eccf24a2777f5654f416b151a843bd0b776. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMTND1101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954c7c144293104cafd7a3e9e288b5d190f735d1979319dc5b321400d9fc18d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMTND1101205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6f32cb2401361aaf051baf17429caceb58bd46abfd3d9a672eb3611fe331c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMTND1101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbebeff5f89ba012916eb2c4cc907264ea92b3b64b8ce25d75e8214b9083727. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND1100469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda137ba30dc3ac007348832420aeba04e8a08df147d94067b333ad01b1869611. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMTND1100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69c5bd208231ae837c8127507dc9bd606025d47115b81554af3854a8e56abb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND1100472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dc5e73be4ea18ee5beeada526d1b448cbf35d52b0da3ab86e6bae7852827c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9673e1e203ba8dd9c2b569afd864720f0011384c12f70fb15bb5dc44b7b2d845. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMTND1100474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d6acd76ed4fab106b8e74769920ea59fbb5b980194da871a5a3dcdd513b02b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819152a846924ea74481818f17aa14de281562b8e9a7ac77a7b0609872bf9dfe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80962229fb4c95d7402a3ff01df48a654e051dffa4b6dbd23279b075dad7028d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND1100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b6f6dfb440cf9c4c887f280cbea30568ad3131c62dc51223d0f86b1ddc2954. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6497a6774f0d6cd785d695fdcd7af40fc34090d090f48f483500aac5b22320. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND1100479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e483090ed9ed36a92d888c58528373e4893281ebf961f308c073e17cba84b8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05fc0b690fe2912ccebb055946140efcfcebb54405e6d27bc701f6b98fc2ea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3ee4d97f162a85a6ab7a26ea3b15dd46ed32accc239d34c5c06d200480ac2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND1100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3ee4d97f162a85a6ab7a26ea3b15dd46ed32accc239d34c5c06d200480ac2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMTND1100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc6f571d31c47163956874ffdc122249eeb3d25a4770c30f42c901f5ee775e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN42194355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242413931c4161f46eb5d96a6917843091e320bb33f1c82405d4afcf3dab7acc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND1100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb44a7402c3282176124a3e6820228301eb8524aefebc33a1c319f2bb5d95b20. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND1100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197da6598638b3df3c84d86bea5d0c785d72e49dd2cc5a516359568afe8bd85d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND1100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9763db9a37364e07d84226ea6022ab7290e1801fd7d733dd073a3bdc4177517a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2882f46f9d805f334cd853a2c8a45ae478ef9c7cf2d54937223a3ea5f14bf80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf078cb1c08f919164be544a01635bd5cbe78ea18f343a6e41f08d4728e95d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMTND1100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6202551392c8e1e20f8e2a713779f41c7377eef8af15e5c4d882b708313a6779. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND1100172.
Oakwood University USM Compilation: The Takeover