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 0xe7d5216c626fb1c3c91bad667d2d4103fe885844ffb5cda6df58f870f5722e97. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccfc820a-108b-422d-a3a2-8e406336507d.json and https://artists.proofprofile.net/proofs/artist/ccfc820a-108b-422d-a3a2-8e406336507d.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 0x1e8611181a839f447a95df2dbfc09bec8ec3bf0717aaa3bff0d7f3a4d64532d5. 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/QMBZ92032925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0054a9433a848850ac40db8731a2fadd5a4b08049e546843ff68d144a53dbe. 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/GRSTY2100784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab130e0ee2c538d24c8a2ae73224a665765ed519f41f3d8a05693f16ad21af05. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GRSTY2100862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c3508898e20287e5fe91996b207466924fd4ec97e75d452484258d3b3149d. 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/GRSTY2100863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1723b7d5f8b5701ab2a6aac881cea386af37d8762d1868572f45eb1f97a50a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:25:45Z), 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/GRSTY2100864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce6285bce4039c3cd90dffe8bdf6682a0cc29e0afec5c7f1db54557c71423c0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:44Z), 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/GRSTY2202785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a017ea4f051a50b5433ba761049e53b66addd0ef656071fecb70dc443c71402. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:44:31Z), 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/GRSTY2202786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110feee3998347e6083ffa101b78b7980f0a9c13e6d47acad5296beaed3fd9a. 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/GRSTY2302075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6d10e8d052a2ed0c6d1d9cb8ff092c71d3f087231cc924253aa80d80d597ac. 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/GRSTY2302330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f33b199c3d1bf1309a310d8f569c9891fd15fc94de44f2266eb74ac0be4ae5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:20:48Z), 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/GRSTY2403217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64aa500b7cebebab63934661bd37f9fb3f82dce090e7acc9a80485394f1a55a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GRSTY2500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a729854c5b4d3b1da134b2996b1fbe8edabd7ce05aefa9a0b5d3e59ec75981b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:04Z), 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/GRSTY2500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb129d60e64efcbad8dbabf4d35735ce6563db5bf1d2e2226f5d8a8cc9345a6c5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GRSTY2500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc12ce064a689bb5fb3106e8816ab5030a3a2fb08e1a9dde4a8103f5f0857f1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GRSTY2500192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd924b847e0229ece438dcb41a5cc6c54839eaaa45b14e27e6411244d8cc252. 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/GRSTY2500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9dec7e7cf4eb6466cd2d841da3c57d7f8c22f45073277dd83dd36a61627df3. 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/GRSTY2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb984145fe68e5f36013198969dc678aefd57c57f68b6e383e9e94a24471f9804. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GRSTY2500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b95a7a5c41c4fe52d1ff1f40b7c1030997a48800f54b1c2575e0a516d019657. 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/GRSTY2500196.