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 0x0eaaac5202f69570b8b93266b934cd451cd6e523aa65db03498eaf1dca485432. 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/4075e376-7fb8-4339-b1be-f11e859f2f43.json and https://artists.proofprofile.net/proofs/artist/4075e376-7fb8-4339-b1be-f11e859f2f43.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 0xd8f90cfcd301986bc9ec13eb67c819483a3cc9caab559753bb85156f442b79b9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIS2401748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ed55791abf62fba99bd400fd2582eb5e0155c2c7dc998783aca9700a83f388. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIS2452375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980d4b48139af92395e634bc56b3a71846a04307be117ebc23b51a8a54c9ed57. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/TCAIV2425831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62171de7aa8ce92937aa47a6abefe80a55841a9ca0b8bc6552e326701d5a6e8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAIU2495066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0009626a19b0f40b8ba4eb5284f385cd6fb48b094d2d53c3f7e55effede0f808. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIW2431760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcbf782caf0dd638d0db47b578c6e9e712cff4bb5ac5e8a6710f79cffe1255c. 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/TCAIX2411919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca47796843edd5d1b985c14f8e6f3e2c2704420aa7bad7bb0f5adc37e6de3da2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAIX2453619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49312d5bc2dfa6a1560a2e290f2fb3c9de6b3c7be8d0136091a25901b380a38. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIY2463702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4faf94d1a44766472c16fcaf7a1ceb51ff1e4ebdb499921c017b3f89869af1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIZ2431276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb929fc5637ff7c653bb4d57d5ee141dfe684b946baf8456d442817a9f940d559. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIY2487323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d5a474f15d8ca026397039255e9270eca5aebcbfe0ddb91419d6035b6a93a8. 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/TCAIZ2414225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca4798a40077b2c73a31a4bc2fdc1a37668d5fd0428645f46905fbb8298065b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAIZ2478911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bea9ebb8193f79df59ffd3122127ff584fa744eb1e7e72d47b472c87c271883. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIZ2478915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7386ff8ac3627fee90de9470e90c8e5a54d072cf0b0508b01e381fa8a735362c. 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/TCAIZ2478923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dd7794d6f9e14a39b5640c72ef2ebe3c698bad18e2c6833a1263ea58f61dac. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAIZ2478927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde63259114f045c31722f31393935e692ab97d60b937d7907ce4dcbdf1c8a766. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAIZ2478931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856fe099227c51eb695a5f9b40034c7a4275d7d444741e43638f0ab3100a8e9. 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/TCAJN2544009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df0b67f4f42e183579ff88794ab60274a798d95485b253acaae4862c156708a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAJN2544032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa80f9787a0e1a35feac39d8a7bb026dc328e81bcd60878d67f0ea7be06a08cf. 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/TCAJN2544053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9de4ad21bf97cad3036ae7ae1fbb2689d47f59c0a8fcc8faf4233821b56c2e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJN2544075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ccdd29f9448e3e6e558ee7fddc2cca2c590e96775c49b3d3bfe8d56a34aa58. 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/TCAJN2544093.