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 0x8380f6cecb383cdd09ddbfe4c11c245a37312f2b2afa40c2b00547183dc5d78e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/197ab82e-0bbb-42a7-81e8-92600672516d.json and https://artists.proofprofile.net/proofs/artist/197ab82e-0bbb-42a7-81e8-92600672516d.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 0xb026ee204aa7443ab6a3b3f1f3c25ec9a7670752173fb33887aa09e181944122. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6DC1873229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce29371c6ed647a3de9498b9d52d0ffbed4c854a1c81a74d29832cdfaee149b0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6DC1873243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe034f94dc0a46df3f43dce80dcc9fa1e2b410003575ea719e5d1d3c5399fb4. 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/QM6DC1873250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c64cbb8ba97af2425a4d3d7361b988bec7a9c3d6ac18e35c59f4df09607fac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1873255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9055990338b1042ff91290e6fd530a8f56789c72e40f5045724a7ea441b38602. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6DC1873257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a43d96c6e0a68c18d0bf2c3d369c272fe3ea6851b9b78d2772dd23ff6bee9c1. 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/QM6DC1873269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f2867f750978d70fb44ba451b40613b2ae9d1cd2841b543121cba00d94f32b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6DC1873272.
Presentando a La Orquesta Sonidos Infinitos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2502c98e17caf9c247342c584a76b22037720a10bdff60147a3be8d9f4eb69. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEVU52365633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03197b3befe2d25547e3e91c202d3b3e89f3459c02cfee32a0805cae086108ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEVU52365643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12142c79857ab279205223eb1e47e2c5539203f620f95dd9d5bd811cb07a847. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEVU52365646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a15c84bfae9709e13d66c16f9a844cbece6716370626c12c30b2c670e7ad86. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:52Z), 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/DEVU52365651.
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 0x4eb8f19f921f77954c2bf2323fef3d381ee358fb9fd3965f8f8806278ff2a14a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEVU52365641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb240f950b95f01659e6614cddf55a0a73ab600c8f0a77ed74565b91d327a0d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MX2620776730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc518b6726fc93399921039224af4fbb19363b710faafb132e6c40fd7b3134d15. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/MX2620776731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdffd2a917f947601c815f29f7536f783932ce7b97e981018e80e33506ed87e. 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/MX2620776732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ef58f54545298eceb51c1541bbcaf252ff3f1c963262f8b5f6dd02761790bc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX2620776733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf095fe86e1a3f8062b110f3a8409fa69ebb93aa3f74246c04ccea7dc6576b86d. 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/MX2620776734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b1873766d5cf367296ef99db97f46c93085339d09dfb94d0cef32993bc9083. 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/MX2620776737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48991dc6380b6b7e35fd8cf047edec68c9a30f2a2ee9a0dfa7448169694b282. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX2620776738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a67c1584baf91557a578cb159977992aaa06f479797f387e0a52dba86eaae. 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/MX2620776739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fec36f1d648cae419c6028e673d5422191fad261cd196ad33b0ee7669600ed3. 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/MX2620776725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaee916394e5531bfbd5cd2693e6729057988a92d2cd56ace4df25c8db18ddf. 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/MX2620776727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5043086c6b1a890f0e455de0025fc4cf99e3c74f18e3360d627a63620fcd0576. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/MX2620776728.