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 0x7ecc032e7036ef489a79618f6c5bfa8853091dc40543487085f8b12d8fc673bb. 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/e815b0a0-cc37-4fb9-9e84-a24ab41f3f97.json and https://artists.proofprofile.net/proofs/artist/e815b0a0-cc37-4fb9-9e84-a24ab41f3f97.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 0x595989f7fcc6b460ffac7f3a0ff788285fe9c3fa580117907f5d0f56c9886d05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB62242161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c8219d96aabebe05f6c1c537f7905ce01ed717932c570e6f6691c931c5684e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB62242162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290846b42eda1cac7c19dd7d1995b3628ae9bf94ef2bed86215bc79e9da94004. 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/QZTB62242163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70608f5a5b7eba3c9e6498d990bbeecc1e26b85469c46ba1b66aa6ed57f59a9c. 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/QZTB62242164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca1fd14bbe683ceb047b6d00e4e421776000b85eaffb6b2953839eb226a4a7f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB62242165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5202f729ab32296a64f572bf75f5192242336c5fee5d82f6a49839654d5b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB62242166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62837cd59f2529469c496a9e0beaf179076a8ed3a298c015ec37c61f1eb50553. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB62242167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ff7f6658c4a4452f7c6e0acd97eabfd4f9f34d85583bc813497790fd853b91. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB62242168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3c2f1033ae548ac7aab26ae079b87b22d8d913248f262e2926f5445af5d9a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZZ7W2493219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e08d449db298e7a538a11013f1cf0be9edff827dc57f07844d5c55d760113. 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/QT3F32491929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89cde3ec6794b13e9bcfd6194f17ba15d7dbad96b32c9ce8a5f56e7ae13a6bb. 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/QT3F32491930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ca19f8a9aa0c0dd6409b105c5128f72b441bae37d3e7ed7ce8f67fbbc98c49. 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/QT3F32491931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b472fe24905b77a6cb718e96628105d07cecd56d60dab94e713e862d387dbda. 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/QT3F32491932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a08367afe3a3eae3d381737a18f9f42456c7e00cb4c3bef488138a684bf0d. 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/QT3F32491933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3c2f1033ae548ac7aab26ae079b87b22d8d913248f262e2926f5445af5d9a. 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/QZZ7W2493219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b6606dcca55eccecafd91276c3bda935971cff299467b408a2501d8912c6dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZPB12402934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1e9ff7e1ac978ae83a4e9f9f2b986ae71d4531504c1eb7543e4cf455f1cdf. 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/NZPB12402927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79966e5017c6cda62597909e37f8e76a110d2f38952f63c1b78402f7bce2fab6. 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/NZPB12401571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a044be0b7cd447053fdec5e0476cbe622b6de14d51b7844941d41720371a40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZPB12401569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6073de449025f3e6cec2c05c813c9401dfb21caadf5ddbf4eb55acbd9a17c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZPB12400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63501aed722bb364a847779fd9b65f7a0667d2deda69d6e1aec35af0454dcd9f. 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/NZPB12400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b68fdd94b31f405e843ff4fd08b7807ab08be29dd22922de3c336d4b700b86. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZPB12302963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d51d0d0aad361bff8f054971cf6cf277de378284d7e514a617ac8521f0f3e03. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUMEV2373039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4280548701d385c10e68e2dcaffd4b328fc5adcdcf26541fb56a2a7d474e5d4b. 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/QZK6L2377799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8df8d3a07bbc9bd2c070360e6b3f1bfe16c69f4e6b31bf0f9dfc487028411. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMER2250340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08caa4f351cc1f7eb2ff0b2558103197aeb2919e95ce37d1820b16bb67e5bd5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52255592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1bfeee00ce6c47edb643987fe0430e49bcd8cf5b427587681fa69ccbed8a5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPLS2102818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebc0c7313c69a7e67ff3ffbe0ccd652f1ba64e49952beeca6529a811b865c40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN62104241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515f7a4b47b0d7f767628cc8e88f1b39a23a41f629ac84b76c9d5df842d0ef2b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA62174290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc5c9b65f9fd786189fb64cc55cc3064afd9badb229cdf4c63282736007a3d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN62038763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea9a638fcf9076b11e58a77bf745573f3722df7dd7a32b066b93c84e28ecf33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN42579286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cff3ce4af6142b87127291dce76bea499fbe1d609a482e1cf8ca03a1319607. 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/QZHN62039234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cb13f8eba7c80e56269fce99cf66a3a779a1b3cf4ab949986995f14e5398d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB22390511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e29c8df6cc7a8e14e13190b5b5f8f557c48d46c58f4311b919bed6c0bd5d6. 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/NZPB12403439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e0bd2a83eb663c47b7fb825b719bf4c8848ad48e01ded70d9e2d17d7c854b8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NZPB12403441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6be864c066a905836c405ea8ee833079ed67b1d837d1444d610145d17ed27e. 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/NZPB12403443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e650f3e1256b8bcc91e34afbe2e897bc2818f5169d835e45597ced0a8b80a. 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/NZPB12403444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a0857b6552a6cf2d0572aa0ec9129a62d4161ca1201e0e0c60d64bbbced86. 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/NZPB12403447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc605ff04fd51e7bb07ca884bf8406858ec7399e2fb959c951a40dd8eae5fbb2. 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/NZPB12403448.