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 0xc81e75333d7bf8e689f33e6f6c63ae957927a3e218ea8b3c18e17d854f789d75. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdd97648-6481-4c8e-b909-e0dac1e2a3c7.json and https://artists.proofprofile.net/proofs/artist/fdd97648-6481-4c8e-b909-e0dac1e2a3c7.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 0x341bf60c0bab8c40fc71f9897bc2a8e5d3388772a8c4a63619fba35f06749f8c. 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/CAI371720629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50d3df2118659fc958d147b297ed7fc262d5625b2deae8bc57d3aa30080daf. 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/CAI372001262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fa93e14fc4651b710d3fa298374351c44ad80766d29ec36c953e32ffabd0f1. 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/CAI372001263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba011a9ccc46ec39cf8c37c269b20859fbc3aa9b668de2d946c3ddab209deef8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAI372001264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2683368b20341ba618eb3edac3c580415fc60ccd45028d0f036cd6d510c16aa5. 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/CAI372001265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e9ede7b261df3e06b0f08730079e433d9fda2a8d30fd303fc9dbd8f4b3198d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:11Z), 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/CAOPL2100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81ddc24f24b0bbb8f3564faafe0a5e9b5e0c7c3c18b8b41767fbae90aa5c650. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAOPL2100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a672de7002d506823840648ad7684182d8a263e1d5393bb5491889cbd1f803. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAOPL2100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94986349ab2967b0ebc06e1621c6fc2fe28b930f81b2ddd346c77eccba9f17f4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAOPL2100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78777a2a5465f1cfdc23cee82ca1e4eb989da933b2bbeef16a949482e1a6f053. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:58Z), 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/CAOPL2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3579415c9211599574be6bbcb116f732cc312c86b6628faa8d53c180b15714f9. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CAOPL2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd728a6ea8ebd66e0caaf554585f3bdc46048bbec159c2487e52be92624363122. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CAOPL2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0b670a2e6635cc16277e7152b672d4f33ec429f9a91ae2953827b6b6017f85. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAOPL2400117.