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 0x16f90c9c35bdebb907605da2fa9d82753ec69d08f0605217b242d4761b0c82cd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fa5bf95-3677-4cb3-9dbe-2fa7844c205a.json and https://artists.proofprofile.net/proofs/artist/0fa5bf95-3677-4cb3-9dbe-2fa7844c205a.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 0x385aba4664c93608318a19628cfd232ca306e234d57d38413bcdeff42e30753d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTVM2362503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e17a7b9a0f0a81117213f471dbf1160a14da4a77e99516034da0881335191c9. 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/QZTVM2362506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c286845a88190e594c11a3ef12348bf06ea520cffb42ca7c14ad3fae1a62ba. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTVM2362507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75025543a428173b5ee3d4fa3af6d0e4bc16d902495c1eaf91430b1344a85d5c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTVM2362508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1da7480d64dfc37dddb88a85d0a5d117a3396ab84ec176ed3d423ed18a1b033. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTVM2362511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50c28ba30592f93fedc5143f78248cd5f22a79ad0595d025d1f3984ecc745a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM82568218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a704abf32e2464312d82aa7d7f3001d7380ad209f510ae69b62bef452584e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USHM82568219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed62d772db2f3b0ed8d041226d5c657450c1cddd361fbbd8fe314593c9928d98. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USHM82568220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0456d2ae82b94f218a2ecddfe1faded910dab75eb3f9f5ba742850083f9d6f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:24Z), 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/USHM82568221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd5079cbacd08171624668ad791ec174d090724b43900929a88651d407f14d8. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USHM82568223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8030f520617c10c6cb3ee2f6d7bce13171299a090adaea3bdfc0f5c5bc2b4c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM82568229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8772c710f5577e39a5698e127db50537858f835cbbdfc62bee5e7a70c51484. 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/QZ5AB2469266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d6dc7a4f990128ad9a73b018d9e15c747ab71e09cd9cbd8ff9158669515aa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:42:57Z), 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/QZ5AB2469268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2798aeafcc767f7371c079e63abcd42b3b136cf7362a8a23d7213adbaaeea4. 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/QZ5AB2469271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83bab0379025e476dbf89e13c96d71d13ecc6fc93bfb7840fa7f6d205ce669. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2438384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e983f9ccd6fa801038e5254c0b7fc0f5a96a53e51f6a4ae6688ea4adfc0af. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2438387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbff76cb278ae86b27713eff30d25be65d04be8d21861394137e273ab7632ef9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZYFZ2484080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3102c995c8e3e777a8363f91ed0a308eacea26f202ea4f0c4c122890663c9ae6. 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/QZYFZ2484081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3253e32f18fd69441f5242aa79634531615169dcec8591c84272ddf51c9487f9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZYFZ2484084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cd8ba965003e7c7ec11dee0a4b8354d8ff73bc05ed5db588d0a2516dcf36aa. 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/QZYFZ2484085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025d2e957eebd130e89dd29cf2feae1c87dcb447b6b3f044de262d37273eba1d. 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/QZYFZ2480873.
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