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 0xdeab66733564924614adc660c93c3d27c790948d154adad24b844f8273ede0ff. 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/5219e268-66d2-4e97-8182-f5e3920908f3.json and https://artists.proofprofile.net/proofs/artist/5219e268-66d2-4e97-8182-f5e3920908f3.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 0x9bc1a8798c3bb13d34f4c6ca0bc90249c9f4732dcbd999d6adb4b2979054ee36. 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/QZES62581041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82ed13e8802a3d2b861c6c22f0e6874547a0258bfcdc698492086b5e3053fea. 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/QZHNB2589287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa370f09d9595916301e777bf23c6f92e09a9604c66faf8c0e43888f549505e. 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/QZHNC2529717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe357a01157eb50b445a8198ba72b9e7e8f5a5ddd1b16e6b3beba2d159db58973. 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/QZHNB2589289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac9aa1bc0a3f967d4fea8770e241030d2ebf82db11f23bd4ffa1f63014a134b. 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/QZHNB2589290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d0b4cf03c70110a370a224e338a5a5ae72ff5f29aa844e7a38352740a61de8. 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/QZHNB2589291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a67c5eb4e1072059d8c4fd7f0e70b0c5c25a15b652779e18f0c1957e6ea00b. 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/QZHNC2529718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ed44df3cb4d1b7c16c92de1cabf632d9aa845e3b76ac98a13d53b68a2ce2d1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTRX2562117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ed6b07800b438c0f30e3667afe9fcf127a91d97cda69705f3ae2401781cdfa. 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/QZMEM2555271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95e6d6270056bc15166fa004983204998ad87c86e6f26e8f06d3e47ee3b34e0. 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/QZK6M2536236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe750b00ba8dc35fb90bd3831621d6717ac5abee17fd10e4d6cf1a8aef297d2c0. 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/SE6XY2515205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34de3709d1bbaece26740f66c6570e83a43cfe448b09d078f26b2d75036f954. 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/QZHN82506878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe5c8633705b0e16415b8d8539c48453c3ea69630968770b31645e08a4b4033. 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/QZHN32597784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846788163f5c06561c3d615b9d03f288a0b542568682c9485b2b7c292f1c950c. 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/QZES82517198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc1a8798c3bb13d34f4c6ca0bc90249c9f4732dcbd999d6adb4b2979054ee36. 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/QZES62581041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80e007bc192df3f39859f6838529db633f052f4a35e4fc10615df64e19167b. 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/QZES72570675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c883e04d267c6adb5442dea5858f8d74a9d2eed5e0c32d1f3ddd86e83a383a4. 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/QZES62501225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba425a025ae06711d20b0cf2c9daaec1bde20565b5183ca0f2f0d8d134f869f. 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/TCAJG2594464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a1dfc63c11dac9ca0dd3a2ed0f422134580570b7a027b0b70b23950f86abd0. 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/TCAJG2589891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd455a7be5f06aa8a0464598ed42430c4c4603776d829fe5ca24326f54b560604. 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/TCAIX2432590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f57219eb3c3f809f824b388e5204e894e330c83bf281c59f7623b2ef36f51. 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/TCAIT2492649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe271de8af2e58ca51dcd08e004c2871f51e99906a054b8fbf2c13eeaf002a5c2. 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/TCAIU2406223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6f8c63f4b5b94b75a3e7807596325f70707edc9a81e055446db16d3534b381. 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/TCAIF2458760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be8cfb1f31f69dabd4fbb62ab4afd2f632cc66995b4fcd6ff770efdaed3828f. 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/TCAHS2342954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf63e5bb08c1b2441fe3f958715847e2b12f1f8c3ff703e1b7c82a7ca478f70. 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/TCAHS2335645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf568d5290259a0062aa4d4b3ebb2d4b347d7a7860eb00d993b9bb712d7699f1a. 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/TCAHK2316773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc25d887567e977bbea81a5a70dd8e29905fb8c798b0c272b12ea12dcf29c901. 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/TCAHI2364505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5807156f9b09c0efafddc55d2422ada693cfe32b62b73bf27b04fd347d02497f. 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/TCAHI2336119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bbbc55b00ec29c960d0a9efa7f4f283f1851bc29ecf311bc4613da20fe80a4. 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/TCAGO2271569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd369d8488bddf9778e3260e0b6babfdd71b2f043bc71c9f973d0172c7372c28c. 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/QZTB52409336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd70859efe8b1ff62a04360d8b4e1474b203b3cf7a07c5948fc6a4127f01c77. 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/ESA012545658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f8f80c119d35b6c22da4dbc71e28d92980502eb22fe57062278813038414d6. 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/TCAJJ2560490.