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 0xe45628a54b065676a59cb4ce9e564137f70bf32b87bf3c54ffe1523264c7fb93. 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/631620e5-3bf8-4fc5-9ea1-f5295e7e413f.json and https://artists.proofprofile.net/proofs/artist/631620e5-3bf8-4fc5-9ea1-f5295e7e413f.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 0xe0380c13ee08f1dbc13012b385b1ad2f827983b84b55d634b345f1fd3bdf9729. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK9G52300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e1fd53c5e1df92213bb64fc6ad1f62fd418493eefe62245f876d328ed370fd. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DK9G52300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5b0934c6c7b67032225d558d97fad7a8dc518f3433e884dbba10a587bd5b27. 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/DK9G52300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116e6914737b05aecb841310c6e8a6d5758d28a33cdea35b34915fb285845678. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DK9G52300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990b076c045accac5acf5f4e72988a36c985dafcfffab9257986ba337a07a2cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK9G52300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ded73414994db108e9d9a381a4c6a78a4c5976438b93a195b932949d78cb14. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DK9G52300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa2b217ac67aacec7d3ffd7a9a50e2d13b23af78b6526f45c1f44c1de5d544d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK9G52300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af833e56aa500d85284ace8e86b5cdbfc464df243ec5456791ccd3e79edc72d. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DK9G52300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d5a75e827cc583477cfda214bd5f2200235b92773773b2eb2fe5a14438b6b9. 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/DK9G52300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07329b9169e604f72733838f17e27724ac4e306d9c8a4135ce99ec52fd4e426e. 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/DK9G52200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b485c17f4710c79fc2e221aaca5abb6ef1bf731e3c9c5f06db19883984e6ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DK9G52200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a27629974dd87b6601f622b56772fb73498f40a11eb8a9681337bbc35ce18. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DK9G52200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd77895c2ce790f5e55add87b10a255086890cbd1c8d9d2c32c5dd4c05d47e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK9G52200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490bc1b83edd07a4a24bcf6077a53f5b659254ddbf259162a602510fcdf73ddd. 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/DK9G52200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71678bb76e17b488fc7a33256e7fb5c1ad69414d6c99c9fd86cff0e1ae8c7d54. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DK9G52200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda45484839bff070d1df500839375e5c95ff725f4bcc8d2b1f94d6cc433daa8f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DK9G52200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af9dac252564060f1aef93dbe85a4880cdfd6f105fe95f0262e422ed0e1eb57. 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/DK9G52200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6196da782a892019daf0f02ea93605cbba36dae2a356919b9a14aeefca1bd073. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITZJ51900238.