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 0x7289aa479c54a13463f294d061c42b912eb8d24804ee9dd38878e720682623c5. 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/aaf0bda3-ae48-4ff6-ba80-0fd9ada76952.json and https://artists.proofprofile.net/proofs/artist/aaf0bda3-ae48-4ff6-ba80-0fd9ada76952.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 0xa0215b8303bf9dfa571a002e6525dfd49e8860adcaea0fde5b8ae4a1e3082f67. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:52:36Z), 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/USHM82023986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019d5b9e93d1b3c13eca8258fab8b1101e0ce03cc7ad02c612a3edd84baaab32. 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/USHM82023988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380e46b2a13ffe6aceaa96e84a020123415eabe0c492f813460b6ab4798ebbd7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USHM82023992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3680d0a52ba8fc24574c0b7bfc17c81578385618315cbbe4372b9ea2ea454fd8. 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/ROUM72400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6fe3e6307de95a7d2ac94f802e3404cd14ef7217d13b2d48904857cecdb0a6. 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/ROUM72400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817f9c9bcc190afbc84c93c3d9c2afc14e3f79d74d3ca4b894cb0d4db369e641. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ROUM72400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3680d0a52ba8fc24574c0b7bfc17c81578385618315cbbe4372b9ea2ea454fd8. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/ROUM72400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392625820301a9718926e313adcd310df341bd55383945a9a7ce89238176dfa. 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/ROUM72500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6fe3e6307de95a7d2ac94f802e3404cd14ef7217d13b2d48904857cecdb0a6. 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/ROUM72400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817f9c9bcc190afbc84c93c3d9c2afc14e3f79d74d3ca4b894cb0d4db369e641. 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/ROUM72400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3680d0a52ba8fc24574c0b7bfc17c81578385618315cbbe4372b9ea2ea454fd8. 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/ROUM72400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6e7f4a7c1a65679ac00f9a28a24096b620dea08687c92ebdf30ff54fa2729. 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/ROUM72500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c9219d040e55bbe5fea4b8def32b05edb393b6423822c5bc452c41f827a13d. 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/ROUM72500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb4e3ae8ac77457d4b442cc58fe4d072e13834a21a6ae33e30410a7117dfe65. 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/ROUM72500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3680d0a52ba8fc24574c0b7bfc17c81578385618315cbbe4372b9ea2ea454fd8. 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/ROUM72400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd772c09e6cf065b936b405f707601011dd4f82a68cb4230295870ace9b2d1ba. 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/ROUM72500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6fe3e6307de95a7d2ac94f802e3404cd14ef7217d13b2d48904857cecdb0a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ROUM72400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817f9c9bcc190afbc84c93c3d9c2afc14e3f79d74d3ca4b894cb0d4db369e641. 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/ROUM72400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52458b23869badd57c6d165f0374f671abad5157a94163c2b74ae94f51c9362. 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/ROUM72500050.