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 0x2c973edb4ab2e70347f32c6d4b25558fdc8409b384c5ba5890d107ae71a0d7e7. 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/3deffbc5-05ef-4ac4-ad76-1120cdff6ed0.json and https://artists.proofprofile.net/proofs/artist/3deffbc5-05ef-4ac4-ad76-1120cdff6ed0.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 0x0bbac73c4b8b384c7eb53cd4c117051c43ac0dc5701f0864102a50aee1339dff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAGOA1800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fe0fe236c14621ddeedf9e04b3134f2087390b62f0f9cdabcc92e615d61a07. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAGOA1800134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19855d17a24ad23beb3758164bc5b8c5b12aa7ff8b25ad428c19aa237b943e3d. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/CAGOA1800187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fe0fe236c14621ddeedf9e04b3134f2087390b62f0f9cdabcc92e615d61a07. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOA1800134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a42845cf3f50893d70feaec1a6eae5606371a1082d18c06814a9e191a5e2d00. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:46:58Z), 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/CAGOA1800185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3fa0b91964bf1c108c526305513e15ca4cae60c8ae3f36ee186e208cf83524. 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/CAGOA1800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbac73c4b8b384c7eb53cd4c117051c43ac0dc5701f0864102a50aee1339dff. 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/CAGOA1800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa58e00a41a9125a769a90bcb1a53e96e61f0d975c7fb2b48237879f12c6399. 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/CAGOA1800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19855d17a24ad23beb3758164bc5b8c5b12aa7ff8b25ad428c19aa237b943e3d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CAGOA1800187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf329bdbeec28fb62b4466df08c89c81cf416d7a27a3b8aa5e98a0a31c420528. 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/CAGOA1800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b77d10372867bed8a29f574b7eb053b2fc4d3fd620395bed91442f21b6bff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAGOA1800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96354f97787526801e9932af765558c8ca40515173d007f0c81806cdb421c96f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAGOA1800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d884796cfe5b2cef3f428a887e7ae9234d8876233b4ce045e5b5bc6c79fb0f3. 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/CAGOA1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec957a2bc8ad11028f0d80b7b03dff849d3dba732aa87573cc04c523c0ed2e0. 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/CAGOA1800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1590460ff48f759d0d631b3ba222935b1e0ae92a5649633065ff7a8bf248f8be. 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/CAGOA1800243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019c9961f9f095450f84bf76fc074514bba41e4eedbe037a9c259c1ebe240a0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAGOA1800250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf329bdbeec28fb62b4466df08c89c81cf416d7a27a3b8aa5e98a0a31c420528. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAGOA1800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf070a7dac84bd4a68d754765614d4feb64f64077c7d50220e9cbb0a888fa5c85. 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/CAGOA1800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b77d10372867bed8a29f574b7eb053b2fc4d3fd620395bed91442f21b6bff. 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/CAGOA1800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96354f97787526801e9932af765558c8ca40515173d007f0c81806cdb421c96f. 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/CAGOA1800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d884796cfe5b2cef3f428a887e7ae9234d8876233b4ce045e5b5bc6c79fb0f3. 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/CAGOA1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6846116ea128bebc16c6f320179690bd2bef63d67c25103ce685523fa0249c0. 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/CAGOA1800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74ba1700c820c1c83d9491c6480cceb32355b151b163f5e4bbf3ec196c5d5da. 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/CAGOA1800261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0672556e067a68f515008fcbf07124532c83effddcf4b71b9cdedd8f2b4703. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAGOA1800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa290306246eb467f81c479cf62686052e57773ccbc40352eea635c9628d6549d. 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/CAGOA1800262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf17a3c6a4e16f9e6834f6383f34ac4f56fcb6fa068cdd6db8d0ce9c07655056. 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/CAGOA1800263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9459a48ac0b34498afff5b483d2c91cbeb0d85efab611aa43c092988277da04f. 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/CAGOA1800264.