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 0x81042b0c3a2b96bea0a61c0cdede1e52321129523d69490350d44d4c15298744. 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/1ae99abd-a448-4d1a-9ea2-160f10a724f4.json and https://artists.proofprofile.net/proofs/artist/1ae99abd-a448-4d1a-9ea2-160f10a724f4.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 0x2c8c08005a5d43d81695a377a406cabcee46752339da18a453aed3b6f3bc0a7f. 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/QZWFP2330349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90bb067a8ab7564729c245de555369eabf1182b3974a2c26627784f4609c06b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWFP2330350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa302fb63ce48dc05db62c90079ad8e9bb6588e67d552dd02ba8d2df8b6e7872. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZWFP2330351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9164adaf054f8c601fae2013a601ae5a3626ac4b43948db19f7ef9b78e93c8b. 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/QZWFP2330352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde34f953e85cd80998a7f820bf5ba967213d396eef24f4977f239fcd3e843f1b. 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/QZWFP2330353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e21f717c2cfd88bad2b364d250dcc9bfae8f47a74dd43c92ef6381ce56f6db. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFP2330354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a08e857be4e202a35d8b4f3ab7a123846b17682ab29242f411dc55069ead1. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZWFP2330355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41198fc940674a9e7cf264a4f69ef9d493d6e58c80c653be220fd58114ce6724. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZWFP2330357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2524e32e341fe0e219e0a3ae0ec8d8b8a1b744b92b56b2ac9ef4f05ff1f79d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFP2330359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf113b3e99dd1c472c521280b7a2c28d6930afd48babc91ef3b69641948281376. 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/QZWFP2330360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8566b578618f8239ed886adcf5cd2434e9f540a740fc513d7ad6567e36d40587. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZFYX2433443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29679d71fdb0e887cd541f7d96d92ad9a42f6f5c174b89be8efd047f14e239e2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYX2433444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f2fee2a6c56c50134ea0a7d2c39fb46e67aa8f714a4adae59dcb74b6531c0f. 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/QZFYX2433445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a2ed4e3f0e52608ce0b0deb19cb320f59fe0d45870a975ef6b79098ee6e39. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYX2433446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2a8447a0e3047f2f3e0b1d6fc762619a60b32ea1827231cd0a4723bd28686. 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/UKXN22478524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c420594eea21a5067c6b60a23ff7a033056003cfea7f86554943b377924570. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYX2433451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb881d8bea0febefb98efa1f575dc60f9f97e70f2828c4eb39687cb4e3235a7c. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZFYX2433453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763390bdec474e295efd3592632cb48d7acab53ff73945a7c7eda2c9f32bde0d. 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/QZFYX2437281.