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 0xb6fd95c0e6ab5e1ba79b025d3508188db2d15804d17542e08556260f35f44e25. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c050fc98-a48f-442b-834b-15671e57c10f.json and https://artists.proofprofile.net/proofs/artist/c050fc98-a48f-442b-834b-15671e57c10f.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 0xd3666615c5d95463710bc9ea82bbafb6072d6a74fa8b3aa7ccaf07ba5f0ab18e. 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/CLLL22000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5956400745eba84dd6a7b2a6e788e3a91810c94d25c8fb5eda3c4801a3a08339. 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/CLLL22000619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b1dfb28897e867c23a529c34e7517c1427e8a48840bee2810ed9b3b95997a8. 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/CLLL22000624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957134189cd08539a77faa94ef39e352c05cae7bbecd9efd79155f81d7207d52. 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/DELJ81516330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd678e75dc4bfe2e1c872e621843f6041e29cbbe869a966fe2840e69621b1482b. 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/DELJ81516331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd097bfd78d337503dd465926da9c313b9b34af0213c2f4d70f7b1c64c0a6d859. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DELJ81516332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00074e43bd540040a435516cc0032679dd973d4d24eb3638965f75278b957d2. 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/DELJ81516333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25129661c889c09684124168830ba5e07e0faa6c6fb82c4083fb2f35563719c5. 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/DELJ81516334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e0fa9ee834e34017bb32e4742fc3edeb61abfe0ca9d49e3f1eb9b35415fd5c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DELJ81516336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddae81f34726c3a94290c4b5f2899e7fb088130faeeee4a8ffbcca0e4cfb31d. 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/DELJ81516337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5bc4a01c920c26ca43d737efd998819d2039db8bb84f6de132bb1f403bffde. 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/DELJ81516338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcf42e34324c26c512bafd6ca54d4aff5ab62011ee4b979b625c739fcbcc3db. 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/DELJ81516340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4d49c5614f40147875ba5a0e26018af709fef4e5086d0daee34116165ad23d. 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/DELJ81516341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ecbd177af617f1bbaf276b0612c73de651c334afe2210fd3a201dea85331f9. 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/DELJ81516342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b904e304913dde1bdf652f0039d1fe35a1fb57d44e891b360f9f41bb1ed98b2. 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/DELJ81516343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79744999629ee0f263ae371b0a571c2a7831796df8e7c069afc406affdc45117. 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/DELJ81516344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3c46a5cdbcc83fb2bb306a8fc0a7ffc840aa4e3b4168bb3e182075f6ab4ca2. 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/DELJ81354892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3535f496fdf61dac7b1885c486436b92f4ba160efe2f467ae1e7a203cc4fca17. 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/DELJ81354893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc1ef6d53c7d5000d685b5475cf6d222942df290eb3d51902f3385b4e5ca032. 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/DELJ81354895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae0d479b548e07427a7ba8dcbac8ec77a9e073704046a9b2259f58dc2ba8225. 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/DELJ81354897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f9a33e9295a9388c950219ef2525915443d1a62e86dbcf9cf8ca027cfe2ef5. 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/DELJ81354898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdc9288f4f8482fe75c82fe891d5fcfbbaca0c42c05a05167100425a2afdaa5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DELJ81354012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fabcaafbd19e7a1ccaf27e528a59f89495228c28258019c9c6961bc77dbdf1e. 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/DELJ81354013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd15d7bbd572ceec616f1d1bd5d4b685dd74d48fa567167181de962e7ef47eba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLUM72400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecddf39e250f49cbe1c33d2a594a130d8e9502871b744964d0e26167c2543991. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAKB2343626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2d25c1aa8504dbb3128e822a6939c448f22f9a1d0115dd28d16fe2f347afa. 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/QMDA72130993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743d17dae51e01a4c454c0692e180edb0e7c988b2583f346df2a8c0d548e5a9e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLLL21900594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a792e1c1c7744624d69c103b047c636ee824df457750c4915e8dc8bdb99ca96. 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/CLKT21700851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb523a17c5fe1d52ff5ada2e4e3880d7810654b9177e61a22c60ded6eb0ae33. 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/CLKT21700854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f7f43a23582cc6d5e6fd4149547538cba3cff2f5d9b74fa188be2b108aaab0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM81695418.