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 0xb6a18e9801b78bcf66b05c91de02a8a060ad5dde634a0f7fa83e3a733792e08d. 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/e661b759-f1e4-416a-8797-6088475ddf79.json and https://artists.proofprofile.net/proofs/artist/e661b759-f1e4-416a-8797-6088475ddf79.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 0xec6de424f3fa3fcff058e7b0e16204c0c35e15624ced372ce99fb66cb843c2af. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:02Z), 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/GBZUZ1300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0247ea85cb466317dde106820ad39170ae6771a5a18aafce04d17450c40117f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBZUZ1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b80c1ad48423ef073a083f81f774da58b68edc7a2f62da35cb05709af3b391. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:16Z), 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/GBZUZ1300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb919bd70d4ed42b9b7b57c10ef338ab2cf84c3886f4a8b8d43bed6e01e99b2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:39:01Z), 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/GBZUZ1300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d999deba28d755af36220c940e35b18aa8a62179bd047dcb1cf22e222feb12e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBZUZ1300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb47dda037ed1428547806163cc4443583bf116c328dcc704c136b69ba4b081. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBZUZ1300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fbffab7bbbff40bf4e0cac8a9daf8434436508c34aebcd11c1365fd17460fb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB5KW1599348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7212f98dc24298246e5f3bbf36f2f632e031281213a5dd28c47bf5ed12987c85. 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/GB5KW1599346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d235823c604123e2f10fdc022051379a719d1f38d7eab78860ec296e73e0e. 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/GB5KW1599344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9234f3bc1d379555abbb5dd449ccbdbb5fa1ea41f5a9c12b442bf47905c796. 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/GB5KW1599343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674b0bb76026a58791bd051400f670910892097edd5eb06d08ccb8a3b0157816. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/GB5KW1599342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb331d608bb0ffe95f20d7194569a72772d20a3c9c26988fcf679a2fa5ea3dc. 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/GB5KW1599341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe110f1a319b1d70348c8f3944eeb8047486f1d3b4428c33b4fcf9b8af494edce. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GB5KW1599340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348898c8604e51770bc91378d5b37b4d90127472b594dacc476036abc93819f3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GB5KW1599339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ece73b23b36266e6733d7057ed675e1bf78ebcec9e1c1e1772d038c7b3615c1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:05Z), 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/GB5KW1599338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63b76d2499e329e0945f31a71bfe8fe6209fe10ffdaaed258bfcfb861880ae5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GB5KW1801707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1307fd9facfc46c828d2963af1d938f3806c3e47c3225f3803d1ba8c3283d3a7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GB5KW1801709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035675b07cd36ab532fdb94bfa21d5e19d9453dcc214f7ef52fabe7c26846fe0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GB5KW1801269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6431d2e788c95c3b75a2824b88e540e4ae77f61a84940a3f2fab3544a72f823e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:33:57Z), 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/GB5KW1801708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6872536db1eff70c65bc8dc8fc02e5563665d79822f64fc1d03671ba5483212. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GB5KW1801712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76596ad3ef5c5c126bc8124a283e41a65148c1b1e8b09646ab5d6818056a79c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB5KW1801715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92a57ed96b3606e371d56ac763259e38023cf756aa59ce907209f439e1fbefc. 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/GB5KW1801717.