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 0xbdbd016ca0a5a84ad2daf0e8108f115a98d1d723c7284b381b5a928b79780fc7. 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/fa2064d9-7f18-461a-ac40-a0a5a3c404a9.json and https://artists.proofprofile.net/proofs/artist/fa2064d9-7f18-461a-ac40-a0a5a3c404a9.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 0x09cc66413f39511434e0ed60032d9838e85a880110f3a60de6a512ed5a9bd964. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/BGA472124300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02401ba19fa1ea9beb527725a25dd57ad09f024c05befd23d17861abdc53bd04. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BGA472124306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0f6351f25b2765bf3affc68605cc45f83eb883018bef2897fea3515461dd47. 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/BGA472125467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d806b1b3743e2f3abecdb6a2eae699569d2d47ab70d435e93138893331c88. 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/BGA472125470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7bb775c780d38ea271cbc36e8bb433c905a619af88cefe97f71892b87d25b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BGA472125472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ec77a708b39db3ecc02c3fee02d7df69515d60614dd3306c0813c9ed81e83. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BGA472125474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d89aa67853fca75cb46ffbf883ff948746636e5b157c928bc6036ad0fd8ca5. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BGA472126122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce181b9ceade173f10a1b55707c96dacb2dcb08a6173d05e35de90d6a604f80. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BGA472126123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03fb162c5c01039be5e49fa3549cd3dd456b7964b95cd8c196fcb3f5a44c5bf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGA472126125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4030092ccb1bd20ee6c84ee0ff7ae458c9b2d48d20af4bc4f8ff0f5bc1b5e02. 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/BGA472126126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252e488c3c01b6d08dc6014544ce2ba4c6eed7570e9ea0fe3fd02a2dbb3922a6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/BGA472126128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fef2fb24e115f4a3b35765aa2bf15039e1dd0739867d538171cb66686cbfb65. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBSMU0068756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88514dc3fd8a8887f19f65c6568234807984a394d80d474ee98ea28779616b6a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/GBSMU0068757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb984ca40b9e8e486b16fce931a6f87e2a0db91dd9647d3f2476dc56e4c886d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU0068759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430aed6d9a994edb53e4b4aed69b3972c9d9969c5d9a8eedd1075d67c18c16b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBSMU0068761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2542e2184433a56facf9de1b35c699535972aff81e24dcc205f7e97cc085c2e7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GBSMU0068765.
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