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 0xada02540cce0a0e52f2cc58e3eead91e223cb7612eb449a68e8fd04e979de00f. 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/effc524f-4498-41ae-bc0e-a86579dd59fe.json and https://artists.proofprofile.net/proofs/artist/effc524f-4498-41ae-bc0e-a86579dd59fe.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 0x9c07f13de89baf041fad447c329073b64980b8e142a7c4929c79f726d662bbbd. 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/QZAZS2006804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee14c97cf59e66ffcb2acd78f2a219e572e192de0c5deddd876bd363541944de. 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/QZAZS2006807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdac716bce7e661efc5b123080104393cd216c1aba22d2a19b7e53742d481a5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZAZS2006816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ee7ce228d260420c165dfdd018c936f54a22648dbc6a1ed018aa56d2582d19. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZAZS2107902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fcde3194d44e806607faa76adb55039c17d1c0cf5941a3b9c574d71b1d5dd3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZAZS2107904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88188621f6ea906dd3535fee63305e95a937b041c3cdfc523d0918a4d791d614. 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/QZAZS2208801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb4fd581e7d52b2c3d3ef270afc6ec485508d7717c10a9a6d464bcef3086b92. 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/QZAZS2208802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05951b9008dce766b67c6c37d1d583195449c64c2afe13163dd354aedbf79b42. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZAZS2208804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853a3de8cfda949ac92a374f142dbb921d89d105f93afe32839e2f2280a34178. 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/QZAZS2208809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8202c69d80945b8c24f56f826bc946a9e6a14fda9342103d2d4123acf7d4278e. 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/QZAZS2410423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dfb1276f2955c7675c3f3c8c6f1488951c6bd7451f4087812148520fd2db80. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZAZS2410401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ead4768a2fdbd7dc5142baac005bac6d6b8da2ac97dc457d30b30e20599f60. 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/QZAZS2410404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474a8cd3bcc6e3411b2f36231cecfcee568c627984506af2dfde1ca1da50414. 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/QZAZS2410405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2113bd90c16849f1e526846114124068884942e8f28ca10426ae2ad42efb03e2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZAZS2410406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c1d37801ec911a503e97a425b5eb7e74546ec16cc3a496504aaa4f27fbe5d2. 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/QZAZS2410407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b747904ea6ad3d258376392e51f17d0f91657ec4a2f12012a2c246b810cd0e. 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/QZAZS2410408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b2ba432addeedadf5ddf6cdf4d7ca8a4b7489954719a80a969f260c775d97c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZAZS2410409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56804be73ab17dc48e292fb136cc48e28ee04e10763009050d85e8e71497b4ba. 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/QZAZS2410411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900e38274468124182280a2a320589845d171b0b4395dc61d41737cf3d8d7ba4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZAZS2410413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd41edc97aec82fcf246725922da7d62c9431cf9d55419365ef3cab33729e8. 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/QZAZS2410418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fb3c96b369eaa31ccb7d73afb9e6462a21317cf8087ae152125c834564c956. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAZS2107805.