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 0x60248ac49286aa405ca56c924ecfdc0dbf75d556b720e9976c176daaa3c9c02e. 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/6e744926-d781-4c56-bcaf-f5b1a9da51f9.json and https://artists.proofprofile.net/proofs/artist/6e744926-d781-4c56-bcaf-f5b1a9da51f9.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 0x0de1b11ceaffb17798e61bd300e03301bbcd2b7bbc1bb7eff0381fa064291138. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX3Q92553031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d2362f3a0bcf14a288200071a53e4fac0703395e7c472c7d2d550f27e1e6d. 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/GX3Q92557173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b613b2202334867e0a8951b5de01b5ae2d2d4b7b9e14fb4a3a2e9c441e8ecaa. 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/GBMA22581663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2e34f0f3cb2ced94662ee4f7a7570734c61719f318a02b18844e5805173917. 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/GXHAF2524193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70244db1c49db945d72078b42a85410b0043e6ad6fbcc2bd33141c8d0c8a713a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:52Z), 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/GXHAF2524194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8cd6331179a4513db572e61277da32d482ca6cc9201cc32808a705e0e115f8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GXHAF2524195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c733e7b8608994983f6b3a3010f3f4bec8a334bc96c9e651b21f433274e65. 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/GXHAF2524196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2234ea9b00d159df3aad03b92f28d59b7296c33e34ef0cb8dc7816c011cd4e4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXHAF2524197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42b3acd00cfc22ebd9bf0ec866696cbc283c73e6fd625b03a973167caf908b1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GXHAF2524198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b37c2e33f94897dae723b27420a7161b107fa1279a8ff4b9a34870eb2abfa. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GX3Q92533315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0339e2c09cfaeb93202082f0050f846d89b938288b8354eb631925377a0fc69c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GX3Q92533317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0e66de9a1cc6470dc7865e080de8cab63f9cd8fb3e775e7aabeb9c05c71414. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX3Q92533314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e2285a97b51379a5b804d7de642c39339f966671ed51617842f340288fe5a7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX3Q92533313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eed2e2503ce7a8941880399fd03160ff541403bb366e90f44e233b33c39e7db. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:40:05Z), 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/GX3Q92533316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d2362f3a0bcf14a288200071a53e4fac0703395e7c472c7d2d550f27e1e6d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX3Q92557173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b613b2202334867e0a8951b5de01b5ae2d2d4b7b9e14fb4a3a2e9c441e8ecaa. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/GBMA22581663.