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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7730ca6e49153011ca276337729ce38d3368352c36c487458f8b2427e0dd065f. 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/10c3fcc6-40ea-4898-9227-c016982d26d8.json and https://artists.proofprofile.net/proofs/artist/10c3fcc6-40ea-4898-9227-c016982d26d8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f25628ff6ac0dff93184397adb8a824affb5c0530ee7aa78615e922bee4ec. 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/RSA222010941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a635953ab46cb4e50c9d53e32fb0f3adbd37417ccb4651ed4f3ae85d197174. 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/RSA222010943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e03c8a4ba761fb8687cc7a0ca19c24cccc2b58b0c12b2380652f77b30d5ee8. 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/RSA222010945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0863e4d7c7e93f532371ac44fdc93c63111de2dfebf70158f3e67f2679ef60. 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/RSA222010946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fdfda2f6412fb325651966bc8c07be2c9e99c315bdf9e03b97c062e898ee4e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/RSA3V2200052.
Hood Guerilla (Purple Dubs Dusty Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615c2d75be589978058df2d754509e11bcd85a629746b99a0ac864dba812edb9. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/RSA3V2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ad35fcbc82ba8f72bf50242512c788c6fe1dca98108ecb47391bfde5fc2ede. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/ATAJ12300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341653f3c7a6a9eab6ede055d7266def55d1e22eb8fb14ff50b81a3edc098b9a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ATAJ12300655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7250aaeba76984d582af140f18ba27e9ed7d33bb0eca2b9852aad19e52b49eef. 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/ATAJ12400446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074b77cf6321c5a15d01798c47afa928d9c04eef64d4c9d4ea25e0beca9531e3. 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/ATAJ12400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2759a5b3fd97b97426a4996891a7b1acd120e35d5e3bc61188fe18305bf892. 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/ATAJ12400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077caae7f439b6f6f29c801459f15ae8b5d6fecace7f11c3e29c28cccbf05580. 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/ATAJ12400745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556cf46ce0e3ff9c37a06683b552a7fe8071a0a28fb17c0cbbf6b65dc9087023. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ATAJ12400744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c646666c53af6e2a92c07a3d84b5ec7ad5a2c35c6071a37372a1b0c65b88ffa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RSA222310891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2759a5b3fd97b97426a4996891a7b1acd120e35d5e3bc61188fe18305bf892. 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/ATAJ12400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556cf46ce0e3ff9c37a06683b552a7fe8071a0a28fb17c0cbbf6b65dc9087023. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ATAJ12400744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077caae7f439b6f6f29c801459f15ae8b5d6fecace7f11c3e29c28cccbf05580. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ATAJ12400745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260171a885033c9abcabaf9cbb11a35d041828bceccbddf52b12e18b72b9a6f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RSA222313517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbf37667ffe6f2dc740f7b1590ec5b24adfd4fff9aa43f83cc2f7a0399940cf. 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/RSA3V2100119.