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 0x3560f243f2f7ffa6524e469b39a10b1bdb59c300c4ac0c06329c0816a3483063. 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/e026a71e-3148-41c3-aad1-f681c28c68d2.json and https://artists.proofprofile.net/proofs/artist/e026a71e-3148-41c3-aad1-f681c28c68d2.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 0x24e1abc065c82bf27586cd1d17015d459ead33e32229d41548bd7f2dc2d298cf. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR2X41956556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d4ed53100aac3bdecfb05f14cb859ddc932bd8f6e7ab97024b6fac1d90403a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FR2X41982480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8a53eb6efb45c01b3890e47f092f88f05aa60eb53d34d06ba3a8e214b15b8. 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/QMFME1948508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f7a092779d48de1de6e38278c3d4b706cf6f5e88f2ec5b127eaecab7105faf. 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/QMFME1948479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaad5cbd09bd7311646693051b93b20f5ebbae7fd0de75da897e9bc548eca2d1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TX2027012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01073e5452b5b6cf3eb4c06c4c9a12bd3fc6ac1911ee8f83d0d09e6347f4c4da. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM6MZ2036285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2da1b83fc63e30ea22750be07ea5a109a6f0327a41586df682cf4551e1a15e4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMBZ92098663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2a3964b504a1cbdcac2e332bb18aab53993ca7e99f2ee4c5dd7cb426a4cfdc. 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/QMBZ92098665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4ffc2d5a0f9a293e479ed73bf189ed9b7e9036dc547fff939e57085dfa988a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX202108140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27ebf3c56d0b381348e7879b0dc092811754f3009fa4687d6b9fd4641a1a3f5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FRX282137139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0741e433e0b04b7f3ccb4d0bb3070994e42f3952c978c68a137888ada9146a0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FRX762115746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54244b6be4eb1f8e94f6442c81b4e3bcb2dbef103fcd3d34e031654133b4cbc. 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/FRX762149158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a366305e7814a4d18e1bd0e715ea497868ad557d351333e8269495f6114beb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRS182110215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4baab98bd1b6a5846db34f82cd540ed9db68db3d89798335c603002fd3f441. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX452303164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500b9c5699a09dbcce645be917fea0bdc2d8e2375d49f9d63948eb5846c6a4c. 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/DGA072375587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a63c0b68873d5f4f391fe331b00d58a4b31fa4b277111d870ca72eec4bae19. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA092381666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7cf235bbbb1997da9d840d42313f45e36b2a931a980060854f19f30c74df5c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DGA092381667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8b905bb9c3603fe487858bf4cb7b0fe60ae4c3675efb3cd445a1dd1c6fe31f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA092381672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8d8e1f20fadc9434fad766f8a5088c3c82ac3e681f44eed541f419911f2e8e. 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/DGA092381673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad54f3e4af9f6178f4ad564108516d59c20bd7c06f2e2eb01b3137e8ed555b88. 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/RUB422303887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ecb6e61f47a5592fcf513e03c42f44c2c4a87e45ad61ad984f4bf04b255b55. 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/RUB422400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159d5e305b7b9477d30745c3cfdbfc0fad816e3b61cb3886c40640a6f4b9ca63. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUB422400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9d03d03e22b3a52646e4b60653ae30402e38f6577be2be9e77b26a2af8921. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/RUB422400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ccd3b1984becbc4ba447eb8863429a62de59e065ebc67fa056d5b4a7a4073. 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/RUB422402717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eaebaad07761189564509cd9511d8b6f37c4f508d9708baf1c77f61ebb4bd7. 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/RUB422402803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd48215ef8e58d1671e7251ac086f95b1f3ae0a38267494c04de78bfe46baba. 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/RUB422402804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2095b18081a4ba06f924b99f611f39443bee83d4ab8097217bf8d3a57e2049b5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUB422402805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84bb8ba833e05d84328eb1f007c4d7e31190b741c880b2c1c3845938379395c. 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/RUB422402806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef07ce2287032e44bd6e4132f52b481726da5a10876ade5ea47215ccc1a33fc7. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/RUB422503237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611c1cf9ab9b466b64f081bc57c4714fdd064248389dded3abf38db3d3a48aaf. 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/RUB422503238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ef7b2e258017cd014e1801e59ed41f9cd651ea9572698b93c05011421c8a90. 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/RUB422502484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f75e848d8ed28db048ee28a61092c9a5975a385e72763ca36079f02057dd8c. 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/RUB422503239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c30f3bd6c12bf15a9ed2b3739b1571fba12bca1042ad94324305b1378a8639. 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/RUB422503240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef0c365a1453d98b42ce3038e4267e08a016f35e3c907a7ace12e58d5e205be. 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/RUB422503242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7bd3378de261c2f81ed7f18c2bf11f87db909116a96495b67094ba41efd511. 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/RUB422503243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672fda667dfecfc39d84fa652c5fefb045517a438e9985475ecba062964fd41. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUB422503245.