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 0xab3b20e0de1f39b2d4b2aaaab8602b2e459e9a38ee2f690ea78680b668645571. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40e66acb-9d9b-4fd9-8953-732165b559d4.json and https://artists.proofprofile.net/proofs/artist/40e66acb-9d9b-4fd9-8953-732165b559d4.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 0x1ef4d7e94835c499e63b457ed69344b8354debb4675e0525abb7d6e2a8431bba. 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/QMANG2238604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35f3d5d22fe14677c6566909b4318f9ca51e3f993331891cee4446860b18455. 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/QMANG2238605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb8421cd26cae901442ba2a510c57d7df0aae43ffd3fd789a83b0bc51f6f1a3. 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/QMANG2238602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec8d0a8b9414e1096090cd055de8c6ebbb3087ee1e3e3099f1f5855037ecc1a. 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/QMANG2238621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa318ecb7c83522193b990919cffd60aff97618e6423373d62acda5d6fc208451. 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/QMANG2238622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ad40b22d4278638c200108b1a084b4d11d5a077ee8a67a866087bbe344cc59. 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/QMANG2238624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eff4cbc79c9c774b74234fb2b1a3baa0a0f217cab08b99befb28c76169927d5. 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/QMANG2238631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae944ffa85cd21e7da5a7dcc683e625879eacb148faa9e9c5121dfbe2df3212f. 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/QMANG2238635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fa6ab95210fde6fcf12cf2e75ffba519ef30cf7159b34c42e4e07a67369377. 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/QMANG2238640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55511fa2ca6ddeefcf630f832868b2c5829a0915dd66fea383bd753774c30882. 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/USANG2408603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef7f81e5cc2262d64a7dc032f68d8c225b95f8b7caae34c0b4ab384238c1d4a. 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/USANG2408586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfcc9e0039e52891b275a6f29003e221b794e05e5db7e9b5ea0febe84745495. 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/USANG2408581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6e46259d1dac718a8cf35cea0f25acb56324144b602d3c2ef3b876fa6db57. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAQOI2306225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3c107be0ef1d9250e84b7442df44d0f8a02274a2bd10667aba30de1ebfdb65. 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/QZVEM2307983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fda1ad9a241b0de061a3ea4c4c50076e52de55d479ce0d52d701c64e840f7df. 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/QZTB22295534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c1cc670a29476cf01fd2b17928fc286f8bd8fe570ca050bb4572a5919b1d3a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTB22295536.
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 0x9c3db8bc6e2211d6e43ae288a25b275f7d02c33ea60aa031833f31988221da42. 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/US3DF2269940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb8c28d416fd31d8ac8ad2c4d81375d148431089787324dc88ed09fab8d6644. 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/QZHNB2208602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06af69f6573a2d5e0357edcd41dd48b95cff0ed905eca1dd9be93a2316e3029e. 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/QZPEW2468995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6baf4a087b25e91ef1aebca06d6ee7bcebf850fff424834746aec47770f21. 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/QZPEW2468999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf8744e41d7d442520254b16514f9865ce755178adecdcacf4335e4d805751e. 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/QZPEW2469000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937b1a981fb9c297e88033c280ba6d285cb472c2f00dd073f5732cd56ad4393e. 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/QZPEW2469001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef8189f482745e13d5bfe42b88fdf0b9b5986e9ef04d37707112e47c65ef1aa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZPEW2468996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135650ad45e9e39fa5a37a6cae7a1594da2f94f0e27a03764d35350879ef149e. 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/TLREW2203912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e862039f026aa42b8139cee900cdcabeeaf21496cd58018ff85bc2adb427490. 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/UKZGC2301498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc02d29a8b81a8f190157665eeeabca1dfbe2643dec9c168f48d7897086c9fb. 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/UKZGC2301499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2752a71fb9516970536ad7e4abe49bfa6b10abf994578635729ac96014a47fe. 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/TLREW2225948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e7489ff2987979262eb3de89aea2d80dbdef120c11ffa2f5d8395643a0671e. 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/TLREW2225949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e8f6f0cd0f624d55431744caa7e5edb96459d0ce802eddca367df1823f6ea0. 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/TLREW2225959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e851d0ce5bf809532ab176c094f5649609339fe2edeb6398c9fad36befe55fb. 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/QZVEM2365889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbad7b14a1ed19e1de4f47305695f6caf872fd33311ea8d0e3861365538a71a9. 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/QZVEM2365894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4429a86f62d3bc23e101ed6e3b225a08d99ae1bcb84733023db29f89e6913b14. 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/QZHZ62275067.