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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 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 0x698f59eaafe76f6c7163aec128c1b931a61cc5648406647178a6e3b44dccc8f0. 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/939d2c63-d53a-43f3-8c70-fd3e03ac4936.json and https://artists.proofprofile.net/proofs/artist/939d2c63-d53a-43f3-8c70-fd3e03ac4936.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 0xd7ca5082d8d656c6729dd990709d94cff96d2822c05b5c4523f09676ead41d5d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZANL1725463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc18a7c5c99a1cca39a978c4e466ce8216b59f024477455f93d00bb2c478ddd. 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/QZANL1725464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7051054a3a9fe88c0aa78bd1a479611a86972bb0fa5006b23f9cd78f4fc87925. 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/QZANL1725465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb685d59f1cd44bce3e836c49f501de22270dfc5fe82d87f1ae6885cb4179ecae. 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/QZANL1725466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9978d1a8c5860661103d27451bbae19b2946ab111114b2116809bab288604b3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZANL1725467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5e90f9afd93744fb7ace13835692d31ff8beef30e1a6ba38a0d9a0083444dc. 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/QZANL1725468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ec2a0e38cc7d83f297070bfed9d130edce665f227a3fb099d62c00212d795c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZANL1725469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a63f8ca8e47e9179341c1dc084857faebddf9b9933458fabf259b1e1ff7cb0. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZANL1725470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a8954aafb213bbd078feb9cccc48aac587ece4ad0a0572ba5c647d0beb4198. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/USHM21875446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5db7686fbdcfda907edcc760b24bf2c969f10b7c04ec05810ead427d81502d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM21875447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59c5c6601a4a824f66d5585967842dfafc412f690e195de03e94f69d39cc55f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USHM21875448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529d047fc4d2f45cbc8c5b26e602089783d704d977ad0f3fe4e51b42b08b8864. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T19:07:25Z), 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/USHM21875449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4927a767daaf8366b2f8118053293aa93d732051906a1a0df6c84f8a267d45f1. 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/USA2Z1901431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c4faccefa95f88ac937faedbb8d9a4739c6b91b7ea016ea9cbfcd5e54f8910. 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/USA2Z1901430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfc264d785e7641d9761c4c8c286e525e7392e2b1bc752f1cd367640266bd18. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/USA2Z1901432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826265ffcded29a6a15da852671a27746a37bda817c7af9e006c420604953724. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USA2Z1901433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699327c1b20c3839c00ff29ee555b19ffd458abe33dbaf548a8e32c03deeda91. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USA2Z1901434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dd26a5e05083eb53accba354f437b8c26c792bc90c05038c383031fa897d41. 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/USA2Z2100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b5a37cab2a99392e0af7cda813c827f492544f972ecf4b70cd68a598da6f0. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USA2Z2100299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e2edf84da81b9c4b382ea09ae29c4a2f2346d41aec5dba749db3498effd80. 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/USA2Z2100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3cf46f386ef5864d8c4fc0c49cb79b6aa4172183b5d32bf9d77accbac7b083. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2Z2100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a145e649023695a0ffa8d7c350fc3174824d6f3b569413034a0d9189f1723e. 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/USA2Z2100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c3d96acec4b14c07c4e812ea5c902fa11f038d2851612ac18874ce3a8d554. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:21:39Z), 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/USHF32215501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf857db76459601f3d6944d5eb107dcbf022116383c9bf30413172a0ff1f2b7. 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/USA2Z2201452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce27e7d07c8c77bc0813f06c14cab7db61b14525a6b114439719f2243c824c7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2Z2201453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226f62900c989232a8414d37670e52e57b46f560219c97edc7ed5aea8463d36f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2Z2201454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba0a0d7327138239418e3f76b9b8a7130d38b9aa3dee3fdf5ec6bd7fe4e7793. 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/QZFZ32450079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34862efb1d0593a8a9573aa4fb543cf479d69287ee0696e37ec64f032f299a13. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2Z2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f8d713e525bf319f70e06d48040c1ecaa4c38d07b7316225bc4ae25027504. 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/USA2Z2400017.