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 0xca6a952187766518179cce0d2d779b31538a5ca17265cf16419cc99d055ec5dd. 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/2b528c3d-1313-4ef0-a967-5ddc32840bfb.json and https://artists.proofprofile.net/proofs/artist/2b528c3d-1313-4ef0-a967-5ddc32840bfb.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 0xefa4f2a2218dffa1b7bdbe48d7529c3f19daae6622e7727f84393eb6dc601c03. 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/ZA56E1801758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc508c81f556da037816130c94b6e085e5e954970577421a933ef73cd88a5528a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZA56E1801760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7b0574d01d1d4b4cfeec7f578c674d14c5514509201501299730a10a43d361. 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/ZA56E1801763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f3696d53e57f22e71db8691ed4dca6f817358a94d0ac12e53f63aea68170be. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:20Z), 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/ZA56E1801766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2858891994281738882802c22b4fe5909308cd35c1a9c5c394bc78546f32a95c. 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/ZA56E1801752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7278807450719e3d9f58969e3719894c778c7504a44d3140cba5f0bc03b47523. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ZA56E1801753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55217b8430b970cd2e714f343b5d80717a175f434940d25f423dee95b3fb18a3. 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/QZDA42200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e3b5e7dc89f931525123d214407233175eb92124af2b155cc14697cb676539. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QZDA42200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761bc2f5158c5ee5a20ef84d75c8764ad4e46d7e3717b0d192421a0b03a53e10. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZK6K2284500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e9fe89ddd57ffecb4ee8c1044c5e2b107247a2464ecc3f899361e7cfe07193. 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/QZK6K2284503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade12ad3bd1f9d68d873c1a3492dabb046de24240ce7178b6f2e0c88f1663d28. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZK6K2284504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aae4b558da2c1d4338f18d15302ff59a8f4da93b3c371f8b227611e8296620. 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/QZK6K2284506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9980091d63875fe74e21ffe396b17ae32930b4274d010b4cba5a53439b90b19a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USDY42489137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a8164d1a5ba7b6fc89f2e1265dab3e2401d788fa075e9b6a867327b0b2b849. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:33Z), 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/USDY42489138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72869192efa0ab689fede3fdf03905ad26f32a0b3b99080e9fde3178c422368c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:36Z), 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/USDY42489139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4ad933068123cb7b529919d7a6d25e0dd77c9589e4870219434e9635da81c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPLR2411630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d80c8a2eb6a7b477f286536821c08ea1dc32dbec9cb30a2ef3eda612ce6c234. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPLR2411632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd2d5b116332d3f4e6e0d13f8b484bb38d453325dd6139615aa37e337ce759. 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/QZPLR2411633.