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 0x1cb86f7987d2563eb21c69009d5619e348990afb4e57a00047da7318af243862. 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/c425d0ee-343d-4985-a4b8-65d87fb69792.json and https://artists.proofprofile.net/proofs/artist/c425d0ee-343d-4985-a4b8-65d87fb69792.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 0x653f38680fdfae84e2d0d655a2c3135213c6c2b8999c94170413f66cbb4c5b8b. 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/QZK6P1992297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f9d1df213386383dc6c8174ea8c9450b0bc8d6ca11aeca64bc14cd28139a4a. 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/QZK6P1992298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd50ac7c25cf3ec29be762d00526876371b37f3b2c180d1de4becd6503d3536. 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/QZK6P1992299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be5311cde14a3b8371a7e08f4b45797d9e601515f2748e3f140513ec1596805. 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/QZK6P1992300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a684dc8554b2853d6856ea53ca7922996359e4adc8d775fcba0b2ab5083dbb7. 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/QZK6P1992301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97074fdbd922a6c0cdb0abd897eaf29c59d942fcf0a20ec147f0a63c98883356. 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/QZK6P1992302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b42e71727ee3bce34c78469e678c4f2014e49fa58fd75eed47ca4c176da4d27. 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/QZK6P1992303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695da2ed41066d9e2b87dd336e6086a4ee6fa90bee7cd505b48f03e68df7b87f. 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/QZK6P1992304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b19e64d86b65713d07d8d996b83539b67f544538bd1a74ff4b0622fd382dba. 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/QZK6P1992305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570f1cada08592b232e1de7f1c10dca803458d77c662380eb889d9691c5cdbd4. 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/QZK6P1992306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce610dd954fd255f82dc03490f27845c2cb44b18183a38ce4a600e6706ede03c. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZK6N2077906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c2f09e5ab589aa8730515c5d3798aa6ddb0de9769300f58ef6915d98f9cdc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6N2077907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8000083808493bd6a61e724b9a11359edbab978d95d5eced4f8483077607a8a. 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/QZK6N2077908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcdd5794393dd9760d7382a78ed05f5979e1c245ce2197c5b22e0b2ea211c3c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZK6N2077909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cca090169ffd9b898720f9cc54ab17e0e91511d026bf4f7e19fe36b3d331bad. 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/QZK6N2077910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3b2f8ae26c75c08deef31934c4f75fc7506824daf777d4f2cf69ac07b091b4. 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/QZK6N2077911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f40e540b6d466fee25a49bdf389c1caa84c81530dbff85f14357c5e3675cb59. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6N2077912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bcf46f3b717dc9808a78d26ee80834c6768733c0624b3dcd905e4047c2659a. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZK6N2077913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d93941923bb8b9e16ecc24d4fb14a0ba375a14889a53c55c8385edfa500667. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZK6N2077914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44877f12dfa06473e7ee302c2a8a8b00c03f1f9d3cb510c782638809d036a39c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6N2077915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a171aab5d55dd3b3e964b54bc4cc0ee8ae185cf9c69e2b0355d69f8710ec620. 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/QZK6N2077916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8212d437ca3e9d057dc28316dd066bc92e763586f4adad169b6f597e8db7cbbb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZK6N2077917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a2250ef2095fefeb0109b4577a4dbdc7102b885bf9d2c8e1743bcb8115d2f9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZES52000549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469e89bed80be39e27df457b3b3ba3ac75830e381778bd39d788d031da3edb27. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZES52000550.