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 0x75c03355dae3c5f5b052f8f061db9eb5018e5850447ff7adc1e57df55f2c3f73. 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/59c000f8-e263-4ec7-807a-478c98f2ad9e.json and https://artists.proofprofile.net/proofs/artist/59c000f8-e263-4ec7-807a-478c98f2ad9e.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 0x3ec80b3dd4f743d45958f8d901fc1dedd7b1f64ff3ae3c4099a350f2980be1b4. 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/FRX281900568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3923082643963312b6499b3a35f7a82a770ab75f4cecdd8665ef4323e59c1e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX281900571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e52dd395b7dd694fdbea1d25524d44125a49c11611181328324da3bfcbfc1f. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FRX281900576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3706b37103c7fb2e4af1ca710ddb66f9bfd95e61a4087ec0390784f5861ca5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DGA072209783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3706b37103c7fb2e4af1ca710ddb66f9bfd95e61a4087ec0390784f5861ca5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DGA072209783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817374f08e82d11cfa2cee7b26705cdb31de81628d5f7f0c0588f533fbe39a23. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DGA072209784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3863f6ebdec3d3d88dc91b94e1d1745bec385d2166845667d9c17c4364159493. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX281937163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e94b68595070cc17a9785e5f84d6973fd2a69679c8b72b1e6bd7d7c7270dc. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FRX281937159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506eb42e2c02ff86db35d7533d801ab3043f68ced4e2d3fe35457f47017e50b2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRX281937165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb05eeac4b5ccb1a56d122a2e8e27d0517f3abc642a2bf5e352e01f348edabcb. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/FR2X42009138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb4c4f6b017d563d4f5caab05c96aef150b59ef07b0269ce3ce95327a0cf61. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R2050597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac387c462e2d2ce679d27c08e8a2cfc58f08f96c77619264ca83f0aa36c684. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX202046018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56911914477fa1c2988d2b4435ee4a2d2c8eff47756bd8fb621894e75b9f2a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282048563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c27bf73674f2351c2d0da4347ca1b115e764237b869090719b7e1e44bee4cd. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRS182096457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec276db19c8340684b13fbb41ac890c301218cb25035ec8b2ce3311eb65aa2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FR59R2188080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43aebe8646fe3ffdf87fcf7db46f237a0627c0fc3b477878451b6e0115d9aea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR96X2117755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2135cfe8b4cd33531951487a85416dd4a8e1f977443f46f8c6825ce34b9830eb. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRX202137466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2135cfe8b4cd33531951487a85416dd4a8e1f977443f46f8c6825ce34b9830eb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX202137466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fad21be3472b3ccc5b9cea65155e72abcbde465061f3c0fbb3d2d0ac3c0843. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA0M2463711.