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 0x4bb2055e08a227d37e1548327051cd9e233a3064f3af62d83dacc58c8e547dc2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b8cc9a6-81ee-4d01-b177-93f9f4bb23ea.json and https://artists.proofprofile.net/proofs/artist/9b8cc9a6-81ee-4d01-b177-93f9f4bb23ea.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 0xddf54e83265ffe7c60130ad02d06ce6bd345f8a7f7412272b1c0f1bb58250acf. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAHX2447231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83943821773480817cf173e877c0129e71baeada0a6d1f50df400902959e371e. 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/TCAHX2447354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8905305340196bc5ef9fd4b72258dc11865435fc85dde4b7250d6c5f0ec147. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:35Z), 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/TCAHX2447485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b6536154d9ff7538011380e522ae2a79fa0c41a647cd3b411a3660ab10916. 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/TCAHX2447512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c39e51f24ae9c830c201b19e4c9b38749bc405cc0ad3fa72c13ea6c06ee50. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJL2525042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014bcbc15d1ad1d7fb8bcfefd82b639006c71e9ec6eadda272b8c537bbce952e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJL2516194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29561df44bee33043119e880d50f4868b247f9043f88c382443c1314c03fbb73. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJL2516214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33699313b1f0031af13830e6844e5dae0a623e4bdb6779816168811c86bde1aa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:40Z), 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/TCAJL2516228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdea67ee2cdb96a24cf627b766746dcb50c4686fae16a109784e805da430ec4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJL2516245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04cd5add02eeed3002d129b9e554ebbb922d8326171898bc1f1ca0556db7e2c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAJL2516263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9389d0784acdece47bc25082455128bbdca76cc3bee0a35fa7417b84b332f6ae. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:35:55Z), 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/TCAJU2552135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a1adb40114ed522cb9f475adf28c45374faf80f2e95a126a4cf2fe88e7c3c3. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJU2552160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e02aeb767e96e9b7c6ed0a9cbcc0ba3e620b487826715a4d67e70b6a18d385. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJV2552982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75d4ee35e2116e8ce4cb1ce029cabeab3e8ada9c9ec1d061689d0ca326a7a99. 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/TCAJU2553002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89a182331e52d5c316abf683eaf59d35d20cdc4d5aab24eca0fe6493bed35b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJU2553015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde34a5723e0da78a1bb883fb370a1a55b65f28853adcbc89cd74746e31b49f5e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:25:46Z), 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/TCAJU2553020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c4079999a99f4a595fb8079a0c2cfb45b11c1b4409b569c8539a69af32b29d. 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/TCAJU2553031.