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 0x36571c43305d87c8e26b6ab3fbe8a38171bb59a6d9a42abd0481427bc7b59fc7. 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/1af3095a-fc72-4ee7-8964-1586fe45766d.json and https://artists.proofprofile.net/proofs/artist/1af3095a-fc72-4ee7-8964-1586fe45766d.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 0x09b22e4e855200b0a9609d3fa5fe1c416f527b08218dd420a27488102f75c6ff. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ41918649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe93e800d4145d545eba4cc616ef23ab5040e0d86012a650cba8cc70b531f1fd. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ41918650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbe96a086e57b3f27162f6478acca5751458a9406fe843a426c5af31fc0532. 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/QZFZ41918651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929af3299c18cf3ec4302a0028c65a85f867b5092044f72f5e57e099a175a6bf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ41918653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8b46dfd1d1ebbd42a5db17cfcf4719b2617844ac2bac3fee295022ed4c91b6. 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/QZFZ41918654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf229b3006fa988bb772bc3b690cae885506a66529542f5792dbaf3983a7bd1ae. 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/QZFZ41918655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e9bc6aaa9b1d6cce8fb6caf07f51ec9102d677dc843dd7cebedda892e4b365. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZFZ41918656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e7f3101f2dabb142258ff4abf05b528777156e5290cb7d5b69e8842b5bffaa. 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/QZES72003273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77342379fda71976ace6a926ff94f5a351882a87f91a1d77f57b0d95a4eee41e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMEQ2217916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abcf70a597964ecca69704fd5b408136fa093380b2f51c021a4dfb62fbbc7b8. 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/QZES62427852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ef4c81fbacc2546d48181c49a4595bad274e9f691463d4d9dc8c7e03c6b83. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZNWU2468905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f445361b258db97b3e45f5b72a3e6a4edc305ea2c804eaf9b4eaad1a9b16d4c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZTBF2498917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d587feedea9321a2aeb1bdebc1562880fdcb4822beaf4d23a4d114a14e0679. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZTBF2498918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25b02d17aa18bb28f6bd23074e6cf9ce09f2396fb285a99aafa45aa692b348b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTBF2498919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dbff2bfaa5f0f8abcb6f4edfb4edd35f31fa4436f16c458b77b173d06452ce. 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/QZTBF2498920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5281770c19b853e14924809fd2e9c9405b443a3da1c8f4f733d6fa548781596b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZTBF2498921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039b117d52bed0a5004321c6b436b99468b1e02a8bdcb828e031cf88da0f1090. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBF2498922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ef28984d53b797c3d7935fb61d57db6ef34244f788e0f868dbbad4d41f8f03. 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/QZTBF2498924.