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 0xec42047f5e6f633f7ad9b436708a458b3432f8f9bb4249ebdaca6fd787653f05. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/733f2fa7-1135-49ad-99a4-1867288cf034.json and https://artists.proofprofile.net/proofs/artist/733f2fa7-1135-49ad-99a4-1867288cf034.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 0xf08748cde47a6390bb08e98164c7ff4372b3045ac8ade834c8fa8a8bc004a9f4. 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/TCABY1408687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d317a438795ed8d28bd9cf32efdb95c23df613954b7406a219342c2ac8fe1b2. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/TCACH1565364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ddbd44b862f11d41a1c59bfb7564906f57853cd2c99415208430664828cf78. 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/TCACK1508725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645372bf3c915b7aa2df35c0e49ee62ad3f059ab1453ed8197c6298a93a799d0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:41Z), 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/TCACL1699639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9925a87d22b82264fd21d042b5fbe13e7116c00fc91167cb8698b6514cbe40. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMZYR1550158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe535cafd9d967989ce2c529e3322be8107cd6ab8a0fe478969ed60d4eab34d39. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZAPG1893693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864ea54e5ae4882e2601b86b19a309b8fdc5f541ecf0c3b98301d6cf4d95df66. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZ4JJ1949157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce5b794845f5bd43b4287f398cadb0f82e722d13fcc432f1474e5e7bcddbd27. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR1909531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79cc97550a26814129c0802e9e6cc75c873598efaa2eb9e856d1781edc2a7ad. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZES81948333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5278f74f5c9cfa3e80f0f20d7860d488ce54d3320f67937a1d9709b574a374. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42026225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bf4c60d4d27c17a1aede52e8272d4befa5173bb4f5b0d65df1e24be57f1f8c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN82114599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40364ea5a8cd6619a276caadaa31cdc5afd9ac73c433b79a550fef38c5e15e3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USYBL1701657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e3762766ab9087bcecc3166115e957d8dff4735d88664cbefc47c1ac156e76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USYBL1701658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc172e72067783b81075b1b9437f1a43a6839620609549715884ac173317814bd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6P2076050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9d9ae50c87247f67d5a192e255c392fc89da3d8916f8a4bb4516d71204f5f. 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/USYBL1700543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88778649739e81ff4c51665d86522b4fc1a46c0e698ce4f515dcd5cc9b7bcfc7. 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/TCACN1673552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f3612bf3ce2eb2bba7be4493ae957a529b3c8c7e065b28a6b0bab3e1610c48. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N21769430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a9eb7927b0ae3a36bcbe0243e66e5ca1a0775b2745aa294e2a978e5dda81b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6N21769431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea29aed23a6cf878e40933537244b58fe810d01a1539cdd5baaf2de9cf68945. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N21769432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1361c069a25df4ad5d244e90c452442caf750d9e3fb356729ede0d2d32907bde. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N21769433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00ce7d344866b203503d0f8b0d439318bdf354c260fc4dabfd9f14377c01bb5. 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/QM4TW1719408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15113e8fb15ac25b168d996ed0b4d2f2e4e86979766a6cc29e78952056015f5e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USLD91711308.
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 0x104a3aa8d87eb3e8519682d5a8db4694d6608b11a808f1b22741502a6d3a1763. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBUM91800005.