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 0xe664a0efa1cb5fc30318f54b25dbeee893d60a891ab952246af1bdf5056dc25f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8967d17b-6c89-455b-ad0a-aa985d56b657.json and https://artists.proofprofile.net/proofs/artist/8967d17b-6c89-455b-ad0a-aa985d56b657.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 0x139c06d3b28deeaef4536aa2bc4c59d68c40c3610547fb43367392faf6f591b8. 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/PT0FP1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ce68ce2187bb2b3c6acc69f6805d0eb6eebd51ccc6f83c3c080babdbbd2c9. 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/PT0FP1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc5d6e1c89f03c95b525ba399a261d5420f1e868c307fbadab92ef85e7c3c6b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PT0FP1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973aeca086de87ee20db5de7f7139a5191bdfe4b38eaa6e03f07343bdd2ac7d5. 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/PT0FP1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcced193b7124eac9a12d3778f9a4fd69635fe3b89e1eb46075cfa18144ca664. 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/PT0FP1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ccb7e6e8faa7db1c2025c0b13eb3f47a7901209e30a979f7420b2a108469b. 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/PT0FP1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b53a4757431a8282a66127c43115e9ee56629eae17e567c6c3b10bebb59d1b6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PT0FP1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b5bc9d7cd4d2f4879ea15473c304dce47a0ab96aea8605f5d483171b151af8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/PT0FP1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb431b777b2b1ab379a047fbfaf381bbe6131ce666c3d7c81e4a18e836e66fdbb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/PT0FP2000719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe122fd8c446d6e19b00cccf3a0bcaf49a2f5d1987154634ecd9fd79294ada6a7. 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/PT0FP2000720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bfe8db187447dde869e4fdbba1f16043a31a24d932929ad12157c5b3d38f19. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:52:02Z), 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/PT0FP2000721.