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 0x126778904cceaf234eb35c2734e0fdc6e378a616ece30c7c7afb5be424001739. 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/bc5b2f2f-98cd-4777-b052-a6cd6d698388.json and https://artists.proofprofile.net/proofs/artist/bc5b2f2f-98cd-4777-b052-a6cd6d698388.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 0x41305a249022585280bb5ed17e98bda9d778e7dc4053d20690a5e298e9a9c260. 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/ARF411000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2507f810901761e0a445ca4d6f27df926cc9f5b3537e211f3a86a39d1d0ef330. 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/ARF411200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6b256167e6d3ed3994a99ae339daa165de0e63365a33a5f0fd93517a470a22. 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/ARF412300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e17c52e150e19e89703e5e1b00e7bb4d19e4586046bf208a437a114884ec62. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/ARF412400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548a0f245066a9441522f6989b1661670df9058b7992eff7cbcaf85416b5c395. 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/ARF411001040.
Vintage Café Vol. 3 - Lounge & Jazz Blends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41305a249022585280bb5ed17e98bda9d778e7dc4053d20690a5e298e9a9c260. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF411000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6b256167e6d3ed3994a99ae339daa165de0e63365a33a5f0fd93517a470a22. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF412300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d2ac45e6a5ab534480b9b11c2c51d189e22bbbc43a7866b825e056478811f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF412300382.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 19
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0433cd5a14f19d555ebf5064f88d796c9c8de02131b4ab86623a16407a6708. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ARF412100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2507f810901761e0a445ca4d6f27df926cc9f5b3537e211f3a86a39d1d0ef330. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF411200006.
Reggatta De Lounge - A Downtempo Tribute to the Police
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41305a249022585280bb5ed17e98bda9d778e7dc4053d20690a5e298e9a9c260. 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/ARF411000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d1a371f4da677c5c738943761a7fa1c7b74e3c7b8df8cdf8c815cbcb372de4. 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/ARF412000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dbf66522f9406eeeefecb11bc94c047a4f5bfada173295833000b723d9cee5. 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/ARF411900332.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dbf66522f9406eeeefecb11bc94c047a4f5bfada173295833000b723d9cee5. 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/ARF411900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0433cd5a14f19d555ebf5064f88d796c9c8de02131b4ab86623a16407a6708. 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/ARF412100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41305a249022585280bb5ed17e98bda9d778e7dc4053d20690a5e298e9a9c260. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF411000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548a0f245066a9441522f6989b1661670df9058b7992eff7cbcaf85416b5c395. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:24:14Z), 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/ARF411001040.