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 0xd72928769a51864afe4f95afda69b5a4e66150f6f57cadaf1ef5817fb849d463. 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/2e7c776f-d2ae-495e-9cc3-03e0d7b63df4.json and https://artists.proofprofile.net/proofs/artist/2e7c776f-d2ae-495e-9cc3-03e0d7b63df4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sitting in the Darkness, Trying to Create Light
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 0xa346576be5065be001223aac94a215d8028c3def485c4c42b2c74d5519c5b489. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/ISV441935203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a0bd019036248a7016111f9467c8df39049ea0e15c2561d2c9f8668596c66. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ISV441935204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eec6a6ee9e39478031b0de6f02fde9c0e9ed40d5bd8df0062884fee93d22b5. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ISV442028201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ca510803f62e15f6fbc5b9ea737641a7b81bbd41d21a2b4e1db5050fa41d66. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/ISV442028204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa65ee0890e1b998763bdcc68e0b5aab1f0a173d37eb155ef38d29ae903e7c5f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ISV982006301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ec8fac2c5850db01c814832be537eb9f531de11e41bd46bd72d72eea772078. 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/ISV442266901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f3b3775ce9046cc2707c42983fed8cbc773eb3b52de2e54d5b049357351e64. 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/ISV442266902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b383f25c5abc82d6bbbea34eaf9de71d56f614c5a8bb92883c42aeea5a56aa. 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/ISV982319602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba296af463ba4dcfcdda451d359c123790c44355776d21ae4adce9a96a731ebd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ISV982319603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03bafca2a8915bf1865c054fbc97108a9b3ad6755482bb319b70905a68c02e. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ISV982319601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b383f25c5abc82d6bbbea34eaf9de71d56f614c5a8bb92883c42aeea5a56aa. 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/ISV982319602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba296af463ba4dcfcdda451d359c123790c44355776d21ae4adce9a96a731ebd. 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/ISV982319603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd3dbaf5a0e783cc9b83fd197042a573962be76dc47b51162c02be42b678481. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/ISV982319604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f080cff0966f9c1842c8dcd92229f2bffc1660d8525a9865e2a4a9a562097ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ISV982319605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e0cfa78c1774e53ca75dd1ed9bf548ddbc991e5be1364afbb362d5bcf50ad4. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/ISV982319606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f74b83ccf3eaa3499448ad84de067f2adac78b464666c489c6c14b1854ff8e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ISV982319607.