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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c615079bd25e4acd66e652704d64af48dceace9a6295380483a94caa75cbd88. 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/2f1abf88-efe6-4ae3-ad49-810542444a32.json and https://artists.proofprofile.net/proofs/artist/2f1abf88-efe6-4ae3-ad49-810542444a32.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba6d28ec64d575e042bacf701ad6e1765ea2d1cc9019064464a923f9fbc4e8. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/DEPI82321860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3405692688eb3e5c71d7f799db69445df6164db028fd974415ded8cec397a3de. 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/QZMHP2369635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a8e581031cf5b57f66aa58e3b34dd43ef5ecec91199d1392f1f438439098ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82321862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd1c3bf2c17a56ab3ca1df7faa7ee2cb7daff95306b0eab1ac8f0b7ba4a04f0. Chain 2 (Bitcoin): anchored in block 957534 (2026-07-11T07:10:38Z), 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/QZGLM2378587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe981de640a65336a338115c10e3564d86d6ccda068018c9a3f66d2f387de7. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DEPI82321864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfb5cfc0cef56703d8d36d7d84e14935056542e79c6160e242141fd325fd27d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZS632369959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe60e22c783390628a1bec9049aa0290ec8eeef7443594c97d5d2c7d03ed0165. 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/QZS652347512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bee00bdc4552d7d3ba8a1f22978b0d2123074091a78d4072cc43e71d829ea9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82403853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cd6eff1e659cee3722928f83a3b618bdafd2254a8535ed333bb85bb371aab4. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/DEPI82415169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a6e46dba6bd103a4fd333204a22426a62e73f19dae0062e298a83553db5a0e. 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/DEPI82432463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c0425a3cd79028782472f5f7b972826ab74ec4cf978b4dfde200f71b3a555a. 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/DEPI82432464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729acf5dbce11dff2aa8a5649f6c91e7418ea5170ab23bc1b786933ddad8c5a2. 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/DEPI82432465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46f5db6cdf8c550c2ba7a865d6b3a7ecd55bde9b87dc44334469608e65f38d8. 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/DEPI82432466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5f6853c7fa44e642fc7adedccc7a7cd9edfd2dd990307e567adcdaaae522f. 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/DEPI82432468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62697f891bef798d9f15dcd1e555ebfb4e124ae957a1caab1f4a5abcf3ea0c3. 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/DEPI82432467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc1c0b79099fd66c2abd60042919d544ef6120006c9e2a775e89a51d60031a. 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/DEPI82432469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b15f23a7d75fcfc8c3e0253a3fa5bbc5e25193031d61dc93c5bd08405104972. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82432470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9942dcb0b242c5469f60ef8df6da69729fcfe5be95ab549f2df0b160e1a3e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82432471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f15a5f58e628c9fc4d22b437fdf41e3b39079b0e57503e286f327f42f1bd80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82432472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40abfcb209e8d7dfc4dba4a7be73eb523477e4c11fbe8db5dc51b51e18dc16f. 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/DEPI82447062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f119f2c8c02818c6ecca2a630366517c522336b9c839fe348df624d582aac95. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82439764.