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 0xe6702e2301b5cdf30754d32063d1bebf6cc94f1326af5d382d06eadba9064831. 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/f1a1ba95-0b06-411b-8a2b-237efd45fd62.json and https://artists.proofprofile.net/proofs/artist/f1a1ba95-0b06-411b-8a2b-237efd45fd62.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 0x1b295727245cbb55c719b933f50ce80f8af582bc106d36448b6a957e12ba513e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2280706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1623743c2cfeb62b9ec1e5fe960feff172045a676d1bf63d9a7e605ff516e68e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2399905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf73e56add38df8e0b948bef2b099d287652034e3208bc3f27dea4ad81f3ef1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFMG2302872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbe34ad4195a3bee3a2209a241b7ef1f55e3c88fddaa06c623082a3739f2223. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFMG2302873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b96bc1a34e3c5037817a70061371322cf873cd8c67037af2c63cb12ca292cfb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFMG2302874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3633d7e364ce18f41d96de76dcb1b650ee945146c73b02994dffeb8f81969f72. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QMFMG2302875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536c708a17f05f80e10d41e991df5e9a295ca00ca8bf3df6a1bf576d7aa0239e. 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/QMFMG2302876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28453ecff0bdb0a3878b4189df8f79990530ec9f14f5cdaaf1bd49020ce0b2b4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMFMG2302877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb408badb7029428a94d8754812ab5080800a1c71e0e9e704f8d024c81310c0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMFMG2302878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d769fce148fca8d26080009d7a43d2f73f48766200c0058e429a0b9243992c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QMFMG2302879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1186cababa53fa28d470aa9930d682402a9cd05a048d9c5322d2eb48b44513bd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMG2302880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c0d4409aed10fd4439c5c7454ee15aa682dedff9848f54baf05b8384140acc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMG2302881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3cb3596a173391303a08786a560831ec4e8b2cee8e05d06f323faa746f2944. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QMFMG2302882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2fd62c7ca041fdc02cf062ffbef81022df7eb54d044875c8218b728120f6ed. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QMFMG2302883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7221a3875d8a9da4d7eef94cb7c60935b63889276b001948618ee4b4077b2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMG2302884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f880f60f843cd2a09bc11ffea338f2316a3a21d81c27b430e769f7e5fe870ae. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMFMG2302885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eccc3fe03e985513efb4d6c15d5f54f36fb4b3601ddf3217beeb71b6118ce9. 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/QMFMG2302886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93aa4e9572b555e9532bc0107e0b4b981d517aea7f69ded77f830d0bf346ba8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFMG2302887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b73f0b4d7bc2aba6f2e37b669307d7ddff9b2dd843cec1c0986edb7317f560. 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/QMFMG2302888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a32719958a6430c5c84afa33669b901c75d5a7cdf005b4cc6b6f20f80b8e42. 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/QMFMG2302889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631f5c90a65b742481d4bcb8c2b85e9d917b70bbf9a8b3e828bd4c74543d923. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QMFMG2302890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2624e331bd4f3dcc7e81d94cfca615ae9b15c0a8b1d09add344cb5ceca0e7708. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMFMG2302891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3afb07d369f46d5a547180da2f761ad49a7ddfd8b550b5f8325e91358aeaf1. 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/QMFMG2302892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bfe47d83f479b1e263dfa483c9ecb5feac91833008c3056ad1dac7db58e3fb. 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/QMFMG2302893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f89655fa57b33e35f2fef2238ed67933ea0b7fc4525b5eecf289c5b6d5ee402. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMFMG2302894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44df69ba4f67760ab60c656f6c013f87e9ee64c5aeabd4cc01ed03386addd38. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMFMG2302895.