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 0x43213542672afb769f4111301f61ae1443ff292ce2ac0a5f23a867f01f6b25dd. 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/3a56f1ad-feb7-41f2-bc0e-ec40ba66281f.json and https://artists.proofprofile.net/proofs/artist/3a56f1ad-feb7-41f2-bc0e-ec40ba66281f.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 0x0a234adaf8dc9c804f63aac8a83b78e64f2b235e3ca60a72c7721b4bcac41bdc. 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/QM7281991484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e6075e348553dd7f0d60ce7cd46a5102384756b8d4b1aa48e8fd68d3e59787. 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/QM7281991485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f298cc5ecc144472fbcc258dfba5762383c9e8c7270e0fd673bfa83007acc4. 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/QM7281991488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3b53ec0277aa19d5f12b6505b5cb47f4200f819d8a8ed4a685d62ae8cb2d0a. 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/QM7281991489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b4aa9848a595171ce5472331e1874ea8fe0b1f55228384781f5dd892b7331. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QM7281991376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55417d55028be8450ed4b13ab01d806d7d02baf3cd621a13cb651fdcaa801bdb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM7281991378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e34685bc96ddcc5eda54667e0b2dff3da77d914a2a259b9982f027ec4db76. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7281991379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b7959c76d63c978a637e5e8b41265777a25938680c1680777be9839bb76b8a. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QM7281991381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4cae84ce43b5b545edf71f4d543fbd7ac84b1c68fa811908424a69bf4bc4da. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7281991382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc351b81bccb3987e38e0937d825f69808f9b14426b390c96d1480d414138655. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:46Z), 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/QM7281991384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd6d3471a9fe60708c8d797b3e5918f94baa10cd41f358aa6c1b03e50f3be7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM4TW2020311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd409db2be66a1afc72912d94f85ece34640a0e638d3ea836ef0efc7bc31376b4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:45Z), 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/QM4TW2020312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a2960137a0f59e76a7fa87b545b888d54c4ced82c434aa99dfabc9081ae848. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TW2020303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3935c65e689657e9bd4c3489f04cb539114e4b8b7f2e800ed92686de472af19. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM4TW2020308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd7ae75a0a87409a3ded13c12caa63c532f740e35edd5bd5cde36bdcf1c1d29. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2170699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2d270bebe5be1d08fc3ef4e2e0c4a59dfca7a733704e925e3761ed503a5d1a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TW2170700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c27bc7e90f73434ffdda800d5c8cff11b1ccff63247160c09ee6faa96a8563. 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/QM4TW2170701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbd591c970f34881b376b0a145f13d1d669287b6f2994bdcfc5c7f69261115d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM4TW2170702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc2cb5981a8f863a94a7a999f1d1713c8f4882550c2cf3b7974fcfa69f0a39. 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/QM4TW2170703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681c3862fe1e932b7ccadba5f681350794c9e3b3e4ca9b5481abbf7145a766e9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:04Z), 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/QM4TW2170704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0902a0455810bed0acf8b9500d4cd93d4c465f6da99b3341d60127fa5d5b08. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TW2170705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf549933dc89bfdabc5f780dc18671641b6c230e64ead39799c324c9ffe1db3f. 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/QM4TW2170707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fd7105887f8061890c34e173f586613b9100dab093d3743f709fe14c604e4c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:01:55Z), 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/QM4TW2170709.