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 0xa8168372a06e3bd3b4a3ab14569a92b1bd34834100ef872e1927bbf6de73182e. 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/f38a7a88-8d1b-4562-b78c-237bc6ede877.json and https://artists.proofprofile.net/proofs/artist/f38a7a88-8d1b-4562-b78c-237bc6ede877.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 0x988e58bd215a6da57c1d4af3106ef9910cba0046d95772170d5c6b3a7b0c945a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ROCMA0901915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f88d221a3891f32f2d74076c71f17b69279619fc50d1ac5d1fb8cf2d1683de3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ROCMA0901916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab0bba8347ee27c4cae2b3189f8c4a2e4a143e2d0d418b37ab5bef428bbd820. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ROCMA0901917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eb00208624db5d290d8933b99f5538173a8e13400db9d1045190324300f04f. 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/ROCMA0901918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ce4465c42eec4e88ebcf0ec727d7c12ddaa93f000d3a68b54eb13b638472d5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:22Z), 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/ROCMA0901920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998fb289f734c51df94e744db078de5bb85a40e8869abfa43bb5ca318200099f. 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/ROCMA0901923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42486850203dc55e04936f5a8e15e83e16cc437b63691a6e5190b2260ecd6b9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:06:11Z), 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/ROCMA0901924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63563046b5475a251b4cccd9af3c39bd960875451149e8d310dc264189592d5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:20:41Z), 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/ROCMA0901928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b8db8c80f1c207034df4c586d2ae48788a6ff3a34692fc32f766aa05fc38d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ROCMA0901930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0fb45b5464d59d0c9c968511fa7605302477cf9fae73448000c643d857b266. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACF1539903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f3b0c9a6784af9cac2c9cfa8d666cd85ab476f304c2595e54efb596233c321. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCACF1539906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541de0a7ef6587833e033b3c480a0fa0a27adb969978256c6201fb0a2bb0d099. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:15Z), 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/TCACF1539911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44cbdb0d3d284c68990dbedb7e3b24cd7e4555f24ff83e27f5f1795a08696c8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCABN1301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44208ab89f749002edbd1c8c960639749a0b6d204d3eb8827254b8860e2b17c8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCABR1314687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe874da85e4174d65db3f409bb982ee8ffcabc1d9ac7b16103aeb119bfa2a4b3b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ROUM71400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c85a1c0ced2bef7457c1044263e84463ab8404d8891e5ce6100bcb7254323e7. 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/ROUM71700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870d1a03c7d2c057e023ee0b331cba4f327782cf59f57deda08e778e423e482d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:48Z), 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/ROUM71700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd057ff2613c1cfaea2e3b14750a9659ab46633d6265494071cdaf58c78eb4c97. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ROUM71700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561587a2c3c0e914551a285d5c2bd84377ffa0307fbc0b6df79658ef0b684ebb. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/ROUM71700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203554dbd03e46f75f754a4ba047701997b4389a81021ef7be735d9f8e91be5e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ROUM71700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d195eac115a6cefad262126072dc994f03f810685a690461d60b3c4e4cae375. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:03Z), 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/ROUM71700103.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c34bcfa0fa8a32a23a050885f90cc9c1de5d3137a06e8b194984bfff464d8a. 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/ROUM71800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688cd877a7aaba1a8aa2996ea2dbbce140c89cfb5c7a65c8590dc8fc089aeb67. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:19:35Z), 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/ROUM72000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91e24357891e3161c2c1cfef6fed836e069b9bb17c152f551723c5d192b470d. 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/ROCMA1711211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bdd8f862944f396328ad87a762025d8be03e658bc6c1a9ba98c08a1d311ec7. 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/ROUM72400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa91666185125b992a6b8b90c2e101767a1539565d617ad662043ee3a98d5f9f. 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/FR59R2443052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa91666185125b992a6b8b90c2e101767a1539565d617ad662043ee3a98d5f9f. 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/FR59R2443052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7875e31d612556f69082b6620c26aabb240a402a8b1604cc77a6c19025243. 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/QZTAY2211188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157cd9444dc569dd126a8e6dcd3eca59976bae3e1968c46181fad6b33a81b5e2. 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/TCADQ1891887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1cee5c1c88da89d73212423e462a1b905a0ed69426489d360f215eb81324d1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCADC1704029.
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