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 0x8609e10b3df6e4ce6799d4be24966d7d118cf387b88a6e61172e56b8a4fcb012. 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/b4376a64-f35c-4323-8113-301d009430ba.json and https://artists.proofprofile.net/proofs/artist/b4376a64-f35c-4323-8113-301d009430ba.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 0x9fc0b9b999386a5b64f1f604ef36b4569fab11fc5722f47aa9e43beab6ed7150. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52370608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388e35f1fc75d53d9dfceb496d38b19f20fbb3e05cd309759dd9a023333208ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32404401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af9e7c671948818222594e9b8ca34c6fe6c1bed874c1cfde1af7f93eebd347. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN32404403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22dc181b2076ca7c02234c2936912decfa6adccf5fcbd3bebd8eb2061ff806. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32404404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ad8b1f24bef4152832454259b2466b5641b45eff64c2ac9cdaf3f242e9ba9a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32404409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e645fe8fcc0bfa145e1c555b57ed77f84d05e1ea1bb77ef8f14421ec54ab03. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN32404410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cad9cff85f2154adce15e52d840632b37e0db943130eb8410805db81332f6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:51:21Z), 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/TCJPV2351035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024238bcda889f4c6960563e6ec2531ddc444b27dceeabb21775fd61ad791919. 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/CAHQJ2277545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaab974a71212ec662427a6cfc48d8512b90dcb84ae80624972eae977518c69f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCJPY2353949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8161ea3d87ede057232c275a8cb5d74926806007ec8d8381b24138e2e7126c4d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCJPY2353666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306dd571c80cb887d47c1feab25c46baccafbf3e114d3c9dc1699b1cbe8bb092. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCJPY2353733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5be9d56f61f02559ac682d71664d1e0c9de695667f03ab73fdca78b2a9f30b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPY2353711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b8003e687ce034afec27bea708797112ba50a8f6a049dfa942ac6a8eb625ae. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCJPY2353350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc89c88121191b717f634be8f20a5b99dcb8e368da27f20280d30dab2d6d4004. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPY2353746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81affeba4ec52ef6fe3662e780845ad6959844da9714b04e7d577dce8551845d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPY2353753.
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 0x62aad5f31f8829de4c23f35bf78acf329f0e2ada556bb5a2ca7248e7538c939b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPT2255798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da0b836ab28c047758637715dbd64cca62bcb9badddd39e437a2a6b38ff5f1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCJPT2207802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cf17e8de07331e41cf5e9769b1bed0b84d9f34b90cc0802f765f62417e98c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:52:41Z), 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/TCJPM2035678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67304b2e41ba2c7d79d0ae105e1dc962121b68e822c684deb42ad6f6af3dd62f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPM591001404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f035b89e2fc66ba33cc5e8121bfeaa13eaa1f30e1b32187d0e297ca0440cbc. 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/JPM591001405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf775716abc8521571650b951a078e3a0056056343560326f049587183d5dbf8c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPM591001408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667d9f3538efc9db4f544af72d34344b96c3d3983ebeea90c1a9738befc5e891. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6M2310521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d50a1d9613ff0c70267dc904bc0520a6f55f69e83a07e679e9fc355974e53e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6M2310522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5c80a438ed00ced2249f47b3f7d7e2f6ebfcf9a1c9e3a5c97f0b6d9cd8e7da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6M2310523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6755a1ab985f3ff2a75966861b352da1ac78bb19bc7d7be3c6ff8ae69f6c93. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2310525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1863d922c5cc6fc93c0003b98d5765cf78a1617cc5eba45d4b7e8d57e815a381. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2310526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a137192a4614e3342c4d04bb59f5707d13eb78b3f3189a0ade15a0ae090ba6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6M2310527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2f7eaa55358f9e93ff7a8fe9b27cb72e4d1617aa34c21f3cff718d217f6190. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2310529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42f712139695ff1fceb9a3c2e5fa48b966d36b5773afc52899f74a3a4df8c73. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:48Z), 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/QZK6M2310530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd4bbf01d79cd09e418a8c8c9d7d0c53aaedbf9ddfc46c1f7fe45e37ad8b8f8. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/JPV502100518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cadbc7211b2d9b336832c4eef03d7d75b68a641c482fd02fde1d2dc763ce26. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPV502100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe376bdf4f632a9a70729d586e525dbd0951709a2041bf0359e83f86797d7c5af. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPV502100524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c4be4eb10e801e1d048ad3354bb16cee547507bd14c90df8759ff92babafde. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPV502100520.
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