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 0x1752a54e7a418d71e53e6ea1e97948128890cd21a20801212b2fbdd499c3cbcc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/deca060e-f72d-4ea0-b7f5-f0e478f228c5.json and https://artists.proofprofile.net/proofs/artist/deca060e-f72d-4ea0-b7f5-f0e478f228c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x34b6cc17f64d7e12d7996f4db301f11e666432bda418573be19da41a397b1045. 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/GBSMU2044440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4462cab7f49f67606c0db7e0b301c272e5d66c7860c38f64f96ae0b6fbf26114. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBSMU8190080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd5e59a3f080456b02303adcc6a6895c05d552bef3f54ce6191a9b239f08e60. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GBSMU8190081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e806b9fc6dec161adec6356088a058cf01bd221f4370754f008f7d7693f95a7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBSMU8190082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cef97d9a7a1b722fdae1b20df73bc39866dcc9f56c4020776f77a3f4851790. 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/GBSMU8190083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84038e61b9eeb99610477c11d91ba97a2a8b1c3ef9ed67c7e2d113a9ed5718c0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBSMU8190089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1fc79eb86bc03756a852b3e40da110eea2f089cb91217c91850f389fc9ad74. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GBSMU8190090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107572beaa2e654db9b592669c61b5c477be9a3f051bc02c0b3ca26151d6b04c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBSMU8190171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3d03ffb1d88c7d5c6360d16f144e5ab3947e9157c2d6d176ff5a2da7e4a22c. 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/GBSMU8190172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd47ce59e69476eb3fc164d91467fc382339ba93831c7898d43fa57f3442ea1b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBSMU8190173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5c1cda983aca97c30685afac20897a54b3926be19c696c5aeaea3cd4a76bcc. 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/GBSMU8190174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5dac0cfec064180e774945f9c3a3bc8ee381081f531a0a2abfc3d81c25a0bc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBSMU8190177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb563785dbcf6cb9edd54ab4642d4042de7e3351889ef6c44eea784da6bbe1988. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/GBSMU8190181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbee560120a7050bfb6342ef5c4324f09a6e4078b9e0ef8e6dea0dee18304f7. 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/GBSMU8190184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74899aadeb5bda0f21a66abac32233aa19457de1d9c353beaf84929408bd310. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBSMU8190186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53e46100cdb2b8195412e2b4092f30a458ec88a7b50da9ba40f13021ff24b6b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBSMU8190188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e7ebef5d0479e4c0814d32dfa631556da9d083ca50c9d55fa62bf482af4202. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBSMU8190284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf78eb158000383a7c92a99797aa4935903b0eaf3238d670bd4be367e421a634. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBSMU8190285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66f3a5cc23492bb32b23dac76772443866315e2bb21e102c90ef5a25660f231. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBSMU8190289.