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 0x8c601180ac290f183d66c794efc59c8aa6203ab4bf8f0dc789ebd61d3e95acce. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90bec764-02f9-4e27-816e-5076329d63fd.json and https://artists.proofprofile.net/proofs/artist/90bec764-02f9-4e27-816e-5076329d63fd.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 0xb6818d98b94f2b07b68cdfc215f0af89a037d88130a4f2555a3c5fb297422c9d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MYUS12225089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ba72870e7f575f7535ea51114b7ed9015176e5e8b6e283748e75b7ddae7849. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/MYUS12225092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cbc907cdfb5d3770679ec2b1f4aa2253e7e4d6b96f8c5d651f86ffaafb6b33. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MYUS12225094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe80e8f0499e042ac4b3597402e47c5fab26ea24f4a1e8b0dc93bad4a125af1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYUS12225095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dbf4f4756e0cc068ab372eff47c1c599dc4286ea00f93f37cf1fd71300d4e4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:41Z), 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/MYUS12225091.
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 0xb306b8113e80e0746144b71b222aa5562f3bec43920b34d88c8646719997ecb3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/MYUS12225090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c817f3e1e18000b2404dd44d6d91f4795607e8c26497f64a1905561a0202e18. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/MYUS12225093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58416cfbe58cd2a8683187572e1b6a7aed3363542eaf0ac027094187ed76fe75. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYUS12221466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f008c4025421439c2dce4403ab7d350a908ad9491f7394acc083ec87893a525. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MYUS12221472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f911ad990b80fa02377f33669ecfe6e7f6075aa6f0eb47da399f3480a3f624d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/MYUS12221461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4622d8f846cdc971884b04ca7966ea4046ce343eb2b5579ed2f91f8d5d27be9. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/MYUS12221462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909795397ed993f5bdf46e848104dd902fad2cfea51df6cc4d6a720119f6c2b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MYUS12221993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d38c592717b575729a21184b94bb7a1cb9eedab3e4d2014b7002390ea1d637c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYUS12221680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2179a21e861b58c38d63a7b97242277fcfd82314280b86a0715bf6efe2e9f256. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/MYUS12221674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f45324336abdc3e428334a6681ea3b8454808e6833850005eb5fd7e9fb475a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/MYUS12221675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca01d9360975a01f794ab72ae964cf1500500df97e3415e3c8e6011440e82644. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYUS12221683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3d95e0fdd5fee50cd561f6d7115110f13b8bc88dd69171eb7b72a3e92918b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MYUS12221495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a7b11be5f6f50f9c1a2998c278f31d4443d48f1752cb500547c79aca2e514. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYUS12221497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66303217af8158c64195e346007c6e94c276b03d8ca93448752e9be117945e41. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYUS12221500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bddd50c522f4f45420cfcd39c660d0e0cecd7cb202bee80fec3511e437afe3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/MYUS12221490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2f2420102ce7ee30e72beb9ff94edd55c83cf34af82d55c25af0d0e57628b2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/MYUS12221491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c37cbd43feeb7d35e36a6aae0dd8900e2b58790d9194441db503860578366a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYUS12221235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de43cd13bf0a61bd4d8fa59f1f135ca2ad2c5da64e5f0ae12bfed6e87b624ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYUS12221236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c1e72f68019e43327f53082929d3679d6b14d439fa657dd5e1f325b0fde5a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MYUS12221237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da14c214b2e012417597ced45875dc61c9c446a2115b99cf9e125d3eab16ead. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MYUS12221238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c5a42d5ce9e9e86dec281954ad0dddec6b83882affd8899eed16a0751226ea. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/MYUS12221234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b3e7a31b195241ceeccf580ef40857478b47eb4db3a99573c2e2117ebc2090. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/MYUS12221240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0210d993896438ac37daa08fb5c2e566ec87d64bdd9bae9f81f74d0822904d5e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYUS12221244.