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 0x642b50db208b9cf63ec73f80b07c833ae73633d048170c08d0db62d7fff47af1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed4fab1a-4fb6-4607-968a-de70470b42c1.json and https://artists.proofprofile.net/proofs/artist/ed4fab1a-4fb6-4607-968a-de70470b42c1.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 0xb8aa5525e0d988d5dd61ade5f4cfec1e31ac5eaf476a026025185f17065553b2. 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/QZNJY2147927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee8204c8e80b502a34371c7a37ea14d10c24d95a758703ad8d766dbb947ce9d. 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/QZNJY2147931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a738eb8af8560a1648a5645eac520e988a43ab42207ecacf0397dbeb9857a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNJY2147932.
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 0x4fbf079e2bf1fa7acdc08f6a0b40455310442ef729d9d3c3c944be7063461ddf. 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/QZHZ41965445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a85cc810737eec17d110d271e53dec0bca16c4969b0bd0cf488c79e9ad83556. 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/QZHZ41965446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa305d0b854f0220abd693f6ff78f704ea6d90663e5d2fe808f84e6f1b9ee7ef. 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/QZHZ41965447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b79b601ffd176c88c35df46c4517f4698f8376973cc1320cf6386d19d500b2. 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/QZHZ41965448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a98dc8fd1ea976bd9d4af071f3096c1eac73846e45b8ad7abccc55d42c79f5. 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/QZHZ41965449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb53dcec56cbc51b9dcdd7b99c4e5a2a80840104285a66758053ae2ed2c841c9. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:08:57Z), 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/QZHZ41965450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc9801a4406b505af7f502dbbd6897e9674cdb66de122098e4bc13a6cf5d41. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHZ41965451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c03ab718b55f0614f7df3fd8d82c97de74c8452003c792111ed812123a0704. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHZ41965452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5e1d1251d268da00415985889baf49c3c9a721aeb1575ed625bac575c84d07. 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/BKAQA2400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf587e04e022b823457e1d0ea4566ea18167a02818070e98288594fa1ffd7d898. 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/BKAQA2400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a56627c2b7aba9e696cc039dab77ce93884881e899b05d0fa86a36ee2608ac9. 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/BKAQA2401904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736d34e441ddfe72fb4765f6985f307ff5196d238f10385fe743f005de1d85da. 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/BKAQA2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b15944e021d2ee4d91bca3d1daf3a82273c914b1da304b5fa8eac865c8c90. 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/BKIAG2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d398317ade108319de00206041b19f46f84e62ec4adf4e5f1d87ee7970a312. 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/QZHZ52274260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc18207c20d0fc491f5933682784adf945436699226557c2d13653f32502397. 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/BR9Z22100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdacf7ad32e4acac6c5a6b95735384380febf687658955ef4510e971b069c7f6. 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/QZGLM2116931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76742406cdd034bfa573565ae052de8b15e4bdc4ff610995b36e71072c1b74a7. 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/QZ5AB2188165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2eb5e42fdae29c4b50c746df61e52b106d2968af9e29d27dc738b5506f34a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXK182000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d718202e0292f4f7ee50aa9878eb0732dc89da8f9258982503808401b783962. 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/QZGLS2060109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c59f55f15aeca2047bf72f78aebb6eeddd758abc3ecf20623f064327a31b6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHZ31977816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b2408b7f5dbad055aa7ff830ede78f29c732ee2f723784da227216b93d3588. 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/QMPKX1874757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda2ade3e1ccab0cad38fbf4445f9d4c1a69deba0219f895c99e8752ae96b342. 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/QZHZ31901179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a8de4ae2bf7b2d919d1e91038d3ba898fc963205f74b6b2db6630d29c23710. 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/QZ5AB2026186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3a7feb1f498705c9a38015d0692fcf34ac7239b7279ce2275c52edbf923f09. 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/QZDA61851391.