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 0xad1d377830e7075fc9bb81462c27188d6488ab1ee336eaad19d0ad8f1c14a94e. 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/f6a1ebd1-b86d-4b03-9017-998c0113d300.json and https://artists.proofprofile.net/proofs/artist/f6a1ebd1-b86d-4b03-9017-998c0113d300.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 0x7fab3a8b7489196529bc8db1fcd0c8547a3ab3e65bd6850ee259a621585c31c8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:21Z), 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/QZFYZ2328258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58942c865ed3ed9fa79b692b2993b4faa046285825846ed6eb10864a38171733. 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/AUMEV2368643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f42fb680539afd7b27937fbd8bc122d3fddec8be41f2d0dd856b85152200b7a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:11Z), 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/QZVEM2360661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12f7ae2e5292b758d479c9718a3a50a8868e4382d434a27c5a3ce2f3af8d0fd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZVEM2360662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f5044c07ccdae3e6f0e5620c988900f13b258766d1cc1660282e9320e3cca6. 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/QZVEM2360664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0de3a9f2eedafdb29b1ef4a93b1245638fbe3555ba5185d5e17cf92e7a90ae. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:34:58Z), 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/QZVEM2360665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdcb3fe95b10f483d3f72e7c255045751fcec53762bf2d8237a52f2749cb9ce. 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/QZVEM2360667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a80a030cc1e0073e154087f84dbd8987ec386ca944610ced1933e4c431990c7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZVEM2364967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2152bfbcbdc20448928285a4fe1270e5f655f3420f2c732f7e85ac44b6e3ac. 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/QZMWW2495932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc858454289a270a9045e99af3b5c246d05ad740063c13aeb2c2d825969c328. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:05Z), 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/QZNMV2494923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafc69fa08edbdebbccd262a9445984788b57bd42f71c6ddfd89841790428991. 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/QZJG52504701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0357e9a200775297743808cbe8ce3c4c8e27f719dad5945609ae6568a924e5fb. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZL382539858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5cb46c4f6a44bd602dbd5630b27152653d9079979083f3a454cce05cbb1c9c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNMX2543248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6178e30690a6dd76734dfa8c3fb0b3ba328a6c39b291fe305e2d0f966544ed2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUGBT2558272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542bbf9991879c5c4755c8a51788d99169ffa6f21fd70d6a5407e4fe5a99495f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNMX2590241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed6a71ecc2a47a32fb94bc903f86ecc513d5139c36c0adc67914a6a4c043545. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:47Z), 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/QZNMX2590242.