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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 0x639d55596f95f482fe16181812e20f3bb39e6e33ed06d22c1dcddb39b8f5fe2c. 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/26e2b7ce-b34d-4c68-a476-b21fe92c7642.json and https://artists.proofprofile.net/proofs/artist/26e2b7ce-b34d-4c68-a476-b21fe92c7642.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 0x8f6968ef90f90ccf2e5775f99916b5a9caed29c15c40a1a2ef837e2e68989604. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPLR2002427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7154126def3ed59ddf8c3ad86c85d4e5fa4a069046a7e1de7ab2670c8074e325. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:43:32Z), 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/PLF242108325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636409f5b13457c76d05d4c74f92be872f9335ea7b7d50bb501b54f0998115f2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:16Z), 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/PLUM72200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c998af801ff661dfa9cf549a4487218675827d909b5af5240f9f68f6486f1e1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLUM72200369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83015dff4815031ed4ece58ca7939b5d4ef51c6c5d0cf52af6b3bcbb1ecb993. 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/PLUM72200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a16fa43e3ead3c0555077be2140526cf5530623f3adacb57705616123f738. 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/PLUM72300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eed82f917a1255e8c00d613df849ef2b596561e726bd62dd405354fa16dfe7. 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/PLUM72300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219803a2a66ce7aa4ca98583f87048243b4a6bc8aba2a257ac9f9224f4c3375c. 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/PLUM72300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e4f5f03ad4e7ead8a03e2a8d2a7971b9dfdd4cea33dbcee1fc1913f7f10fdb. 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/PLUM72400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88913fd965a0110880b71c77fa9565e30ac58d4b6c3ac59b83ee924ec9b70680. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:52Z), 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/PLUM72400205.