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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 0xda9800ff09a89bf8f8e3fb86c11c9d5dd56d99dd2364ee66116b1b3d4d2b997f. 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/6cd3e9cb-a617-4def-9edf-bed5fd2f6575.json and https://artists.proofprofile.net/proofs/artist/6cd3e9cb-a617-4def-9edf-bed5fd2f6575.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 0xc3be089bee7bbe0fe96914312814af3412fd6177063182bab8f1b46541044ba4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPR501719161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4997f3a4b9d304d7fd18cda15f9b5b58bab193b9553c9e2aa0626f8cbae625b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPR501719163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b626a124c46291b35b3b83ff203ca056d7f3d4a20cd4f2831af1f758c098a1. 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/JPR501719165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34e91b8e3aecbd3d541daa8e532fdb8d16461eea8b8e87df75a143205e264bf. 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/JPR501719154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34e91b8e3aecbd3d541daa8e532fdb8d16461eea8b8e87df75a143205e264bf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPR501719154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff9215be7d5fff2e0710edeb8091992eb628bff2b09e9be81896ca271755f43. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPR501719155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cfacfd405f40db9a1874c3998a9653700287f2bf03734599b8ad175ef674ac. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPR501719157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62e486024d0aeebf1ae92d37b6e93834d69145ee20542f251ae5a509b1cfddc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPR501719170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e6870ff0617958ce5ca8e79ca59365dde5e3ad0001042421da18288df65e1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPR501824211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e4403a8b21cc35fe33ca2e5ea69ca78ba205371d1caeb34bece9985dcdaeb3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPL2056595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e4403a8b21cc35fe33ca2e5ea69ca78ba205371d1caeb34bece9985dcdaeb3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPL2056595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b9fdab653d4f1685220e305114815629124f9e435eb8e9feb28f05c26d7a6. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCJPO2142438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1367283e9a28445f54c2da8804f2a2bd6aaa8797403b8822ad5ba8b498a677a0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPO2142446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7060fe3e6b32f18461ac8c393bd46ac454e37d57504f267828b88e5ab3cf22b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCJPO2144614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2858fffbff24429c81a0e08e33b054d575645050a03f221f76f6891a77075e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCJPQ2107382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58b4140822327f9b53c9fd7f330aba4e7bfa8759eedeb5e0deff482b20f07fa. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCJPV2317955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75525bce230131c989066ca9627a941bb9203c2e7e5edcf4a014130f7f0af13. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPW2334495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c759b4d204fc10a7002651c6d57bf7954b2d2e881bdcb5a296a9cb84f8ee928. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPW2334497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeabe5569e7bacaedae47300580bba26b72ff9d1683b6aee15254544c0a3fcb. 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/TCJPX2372361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4fcc8f7c7edcd356cbd79a158d6cb1fb601145df98c77616c8c3691036708b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPX2372365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fbc4211533509dfee65a2a02dbabdc4323de5f2e7200bb164ca50a4242cc31. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/TCJPA2413413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42718325bf89fd05bf9ad068d38cd87549eab034a4b6332d391e1f741373da7e. 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/TCJPC2414451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5034d4999b535bfe76c9daf802511f40cd9d71aa150032fa8ed9b4c4bc067ce6. 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/TCJPC2414456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e27f31d95aa56b72e424febffc5f35c81ddea2583e2fcdc1f3ffb450cec807. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPC2414458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b17448f99faa76b7171194fdd96c4bc3356714f1e49db67f9ebfc555aafcb14. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCJPC2414461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb1316c4337827b377380435f703b8a4ff1904e2ae27469322a82b67cb5879. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPC2414463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adb1305571ee39555fe8a35068ae1ce9a30ee2f025d91f4233f0f8b3e446af9. 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/TCJPC2414466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1447631c42202e720a220253a08d19c127a2f4a8c4afba72dbe42c5e9b51be4f. 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/JPZ922505027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3d6ea12d6f1d4086853264d67e4bbc04cc540aac83999c722efac4d965b782. 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/JPZ922505028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822bfa2c48d9c16148ae5dfbc6b510e5c6de586e7471cbbbcbd65dcb9403560. 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/JPZ922505029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8552c5af557177a39ec788693979facff989d1b7ba58fa978ab1100b366ebb0a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPZ922507170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aff9f1fcc14aa393e70bdcd352913483f25bdbf661c57d6664f9edd3a837a7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWUM72000062.