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 0xf3a4f7d6e19a187da185de1f577a29298d63e533ca35d3f0d2bdbf37becb4899. 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/7b8e5b52-17b5-4034-a459-a67caf4fc3c5.json and https://artists.proofprofile.net/proofs/artist/7b8e5b52-17b5-4034-a459-a67caf4fc3c5.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 0x9d50c2d17c71e31696343a158d2001d1dee8e35c0e164ef2d0a8256e3eda25db. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:23:05Z), 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/QZTAT2109314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f2ce1273d3a2ab1c59fa70270ea88ee0a28f1de2d2e01ca6b79ce348ae7ab9. 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/QZNWY2297890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434801150c8ca0e75cd453673dd9a475211c8c09761346cae5f0aee906a81bbc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:53:32Z), 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/QZNWY2297893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9589526f60b55a5ed0f3e3759942c4f3c7d5ef113dcc1081d86a13f6a6a141b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:45Z), 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/QZNWT2302129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab403d467d883a799291ad0d18fbda14c8375eba305a62ef85052c791efb291c. 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/QZES52465188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5cfddafa8c5b77d455a4dfa1ab8059aecdf22f972ffb27edba013bd5ca2690. 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/QZES52465189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2f7d8b6dfb8c54dab415402c31ffad49ca3a97a571f1aa8f0ed1b3ada6361. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:42Z), 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/QZES52465190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496f6c82c58bd916a4e10e6dbb11a1a774f85e67370082f1773c42585f9e43fe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52465191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf92c53595a9479ad6879704bcc3facfff18326f30d868538cec725acf4793c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52465193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443756779a8c2a87264e1fd7ca09235f71e23628c513983574fdb8ba9bab53ec. 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/QZES52465194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda072c5b553bb9d754df4705f94170fa42ea271c1933dc425f81001e678f2301. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:30Z), 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/QZES52465195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce1cf340df46c2f5602a65670578e44450b7900f19968803d76d23bdbd45c2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES52465196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949896ff4c61e3c214d69149e30e9385ff668483ba6b67ad1bac8a4cce66a223. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52465197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac5c83c398e05c7fa89f62ba99aa22d09d7e4d7e6359cc2eb761ae1e2802bc2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52465198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61096bc1e0b7fc23c3cc93216cc07c926d32c8566bb23545c49cdde37d0ac7cc. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52465199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14666d500d41605d95d0f865b40cac6b4f5ce83be874411a8d3875d38dda1610. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:46Z), 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/QZK6M2597086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15473039c57038190e47d70363cb00b218af79733544d06918807a4bf3b6627d. 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/QZK6M2597087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58193383a13f4c8ae47e7ccd3c0b5dcea04b0e5297d9b8bc3863331d28f5450. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6M2597089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db488b20cccc30943a9be34f1ede1ad17e71b404541382fcda34e16ce7db9d2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:24Z), 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/QZK6M2597090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3680cff7c2cdbbbd5bbee6aac4313f9263059579b392a417029b59ad4b22b283. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:19Z), 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/QZK6M2597091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590310a603f5625710ed85f59f08c37ab199a0c938de6e99aaba6b2f5ba71a9c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:47Z), 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/QZK6M2597092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6ea2e0e6cf1d88def8fa4316d56c25d292bee7b6c726c5d1c54077e197b999. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:26:09Z), 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/QZK6M2597093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e5dd29052eb867487cd0c11c9c374d9f29cd74cd0e316c908c9e19099dc4e4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:03Z), 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/QZK6M2597094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000cb834d3c09b583c761db80f20e570335c9e81f8913c990814f1cf6f39f88c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:11:30Z), 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/QZK6M2597095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c79a56d266e67d1f2403caceb42ec00f45da58355dcfb5d9eed4b394e00e6ec. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:38Z), 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/QZK6M2597096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44d1bec4e7b610067b52199b08991aabb00b9ebe3a4abfe2db66bff7753d27b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZK6M2597097.