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 0x8912bfcc866cb8ed4512fc354ecdb5a8c86b1d58f39f76284f3632dd199acf98. 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/92b5f535-335c-46e2-a64d-126919a78031.json and https://artists.proofprofile.net/proofs/artist/92b5f535-335c-46e2-a64d-126919a78031.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 0xd575f7bbbe29dcd58e5bd095422bf08b732d4b586560c0c56d65480ebec932fa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/AEA0D1866557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9363a6f1e6232654f0a58128b04f283383e547abba6628b54d753dfe8b359764. 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/AEA0D1885267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9eccd861c957f28c22944f7c172e43c428c1be85545147203c6684d0bc1fe1. 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/RUA1H1801472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38968391e433acbab9d50dc52acf052c7dcfcb0160beb0bccb77a18c30fdfc98. 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/USHM91950252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f99ef9e8486d063eddf8832e32770f01d5405a82317341a9d22a16a3a6353d. 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/USHM91950253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d703e84d29a9c2538ffa6a12471d824a133be0e0858c41e62c24caab5ee0052. 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/USL4Q1931486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a46e0c5b8c9d3ffdf17082c190b3cb3a9b5a856aa23681492b8ba346cc279f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USL4R1924133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd569042ef822b1149be569a6feeb66d2f98e496228190b511c5d3015693ec163. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USCGJ2027450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53647b99ac5e49faf671a7e5f381990c2cf9ec24046290d786f34aa1425a385. 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/AEA0Q2066812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7b9a58f5e052fef798381b996286549f4cf5e89838cdb1704da5551c33ca88. 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/AEA0D2165108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba1dcc38a73ba0eb8f21db995b4235aa0bfb907012a136f72df7bcd0044c576. 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/AEA0D2165109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c7c91c67f56be83af66ff7ad85945369ff14b4c83a2fdc4da2de64cf3b44f2. 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/RUA1H1837559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb01fd2cc2f464086f0eb5dc0087293950f44c965278bdf0b54e10f4973a5f. 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/RUA1H2223788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15934b05e4a16ab70c250107819ad116a9bbf5d66f2e282c4d5e81edcaa5575b. 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/RUA1H2284403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d26e7932efea2faf364ea1731ccd78a610c4e95c49568b0258a556e7fd074. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/AEA2L2209239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa37176434a49d8cf6565e5e70b5a727f80ee9e67d807c882c1678499fe09d. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/AEA2L2293531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31955414aa96118871206475a2021ca81f86322583430d636fb7b7114b518486. 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/RUA1D2287738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7357a95856d7d15e9ec551bd1903659f40363fda25fde3a21d3e217ae92b3968. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUA1D2176049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee23898fc8664952121f52600a716019f48757bc132b89d2b66066482da2414. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AEA2M2324090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43d0311b6c1c76a880345edd7139c686153ea80bc6c8bc59bbc7cae56f53be3. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/RUA1D2355254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8959124ebb6cd0a800d90c7e97f51e4d50ec8102658534930d2ebc4236f6b520. 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/RUA1D2396897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d13a545bb554d464bcf46749cb49fcd23965ef8cd32fc6fe44c0fa025d0bf0. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/RUAGT2338708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991dabaf341cfabf2d30af2db1c31ad62a0132331097698627c08b00a1c7c5d2. 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/RUAGT2376354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef4c9f936f9b2d4c5a4c6846e0fecfb0c4e6569db2c36aaf14ae42df18af401. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/RUA1D2401348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6a40d1db086465bd9c0bc3384febdf0ddd09999030abe517a4ad2bb5386f26. 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/RUA1D2411186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9ef1199e1653a4b0a8da8b18b472cc74410c23d614e8d79ccb4f1b7c0c0848. 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/RUA1D2423389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18944b4c0a9c4cab807b03bf9893534002973776d126d50612a5a9d006de5c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUA1D2434584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe734d570f4ce7bdbfc4b32c858ac6d7dd5181a374188de89ef5343dc839da232. 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/RUA1D2445271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffe985f6558299bc00bff4105371c7d9485460e09d9f011e4a575f3d661cdda. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/RUAH62419093.