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 0x7c04dcdac8e07be4d5a3afab2b71d6a20edac80a08aebe724f8b72e183afe91d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bd7c963-c06e-48ac-8c61-f07252fecc2e.json and https://artists.proofprofile.net/proofs/artist/5bd7c963-c06e-48ac-8c61-f07252fecc2e.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 0x09afd1bf25471f792d1e07d733a296c388b813a65f359f1b85e9ea4eccdacbe7. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:08:24Z), 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/USL4R2420397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ae2130283418df0ace9d88ad612d25458329c7d620d7aefd17d610d72d9ab3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USL4R2420398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fc7eef40792dbcc9d4cf698cb67085ac18fefdb914143682cb1d39aa14f4aa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:00Z), 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/USL4R2420399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467f1e7534e490c8656532bd9735d5ac8a44640856ea3ae00dc3a33d4da3ad33. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4R2420400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce36258bc1c9162a660f8dbbced64202d6ccb37cc79aadb7b27e5819e7b9d919. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:05Z), 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/USL4R2420401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d818516c157b51cca25c46ba97d9779fa29c6812a5f38c81052554ea3d2471. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4R2420402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648fab49117182fa91ae58e169080f4da20e60605abc7fb0222a1cef9f65e77a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/USHM22556339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41e94cf4b50dc94b5d5a9fc9889cedf7d26e7a7e253f3954e71c6b6a7f95e7. 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/USHM22556340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2039478a45345cf982825892a07146a3024e133b66b1378d656576754509190b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:26Z), 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/USHM22556341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751ee5f5fdb3dfda4b75900b1f29aab7794381c87125f7d880e084c75653f262. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM22556342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82502847b41075f99869c2ddf447b5d05bcb8a52613c68d3a28b54016ac1c3c1. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USHM22556343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765c48f4d3a1f860330c2018fad1f0649446405b7751a5f7ddd8e2cb13a0f8be. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM22556344.