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 0x4dd14f66283e5b7be78ee7404b28f917b9f800d49e237ae07888c6c7a146797e. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd8bee45-a277-4ac4-97df-4ac0182c01d2.json and https://artists.proofprofile.net/proofs/artist/dd8bee45-a277-4ac4-97df-4ac0182c01d2.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 0xde4ccf3ca4ce4915a517f006f22a71d5e7bc4829c1571175f604ee5627e4589e. 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/PL50G2001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377025b2c824987339e84c0a17bf7fccff6c4726dd1cc9f0059c08a1d301f5d6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/PL50G2001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72566ae0453065684baa3ea06fd6037b500c50953b659dfb791307f8871a903. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PL50G2001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8053042bdd92f91fdda97bd75db2c2fab91bf6f3bae0e0f55167f93135332f19. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PL50G2001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f65d367270f3e82aaa18a63112a17eea4850f717f127a03b17c58b0e115095. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/PL50G2001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95008cc983b1ccb6edca9cf318292780505bbbe12a0cd9bf13f9cc299644b2de. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PL50G2001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9305629502311875bc1822816b97adbbb822e7f017c9336a2af11230c8d38. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PL50G2001009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb757d516562faf7dcc0cbd1b43e2a6c7a5dbf83eacfd973f75438aa4d687ef1c. 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/PL50G2001010.
鳥の森：良い睡眠のための自然な雰囲気
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d941cb997dbd4a97885dda3027e0d6796da82f6fdae5d6c0b5dddb17d48176e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PL50G2102607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13454bb2d7b7f6154f20396d59fb6b58c3e9d51929d3ef573c68cba39caae16. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/PL50G2103116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5134755db9f7c455f6b73f5ed87cf0eb4bf07f06ab7382f964ef8cc7ce6f5ae0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PL50G2204529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10da7a195cb204cb640b0b99acebbb7c064c05c85c4e12b0e0e0f47cb738a09d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/PL50G2205611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9ea89e36da37211d0c9199b5a19c75bf7b4a58ab566ed2cc9693ac9fb046c2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PL50G2205612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed54b929f442273603820f676234b147ce57eedd6a01bbe956d97d8d7a4ffbaa. 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/PL50G2205615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5134755db9f7c455f6b73f5ed87cf0eb4bf07f06ab7382f964ef8cc7ce6f5ae0. 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/PL50G2204529.
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