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 0xf11ff04452414d75f87f42afb39d042265f8ae4f1213d01bb583a8f0bd78aace. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a8bd319-ee50-4efb-8af0-e10bbb1b9fca.json and https://artists.proofprofile.net/proofs/artist/4a8bd319-ee50-4efb-8af0-e10bbb1b9fca.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 0x2f1be8d8ebdb1b85c7c95fb424189049553fdc988dad05099bd4cc6b0c8e8313. 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/QZFZ22365365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0328b070b342f7b0172a971d3af08e1e711b48bbf2f01e8ff1e0bccfc6202dd. 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/QZDA72349408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4156f13ccdd825af583bee68e71c4999006cba9daa1769d04202bc4c38a08f6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2338197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faebee338c6bf760d51bb3a92cd8b8780c62dc79467910e9517f695d98e826b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6M2360239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a23178bcd449a66026aee1d220e33f04ffbc2862d04db84d943668a94f30d2b. 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/QZMEM2357357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602f9f1c2fc795c90d25d1a70f722c6ba83ea981d86d56badcb0c9e91cd41a3d. 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/QZNWS2348923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41f6ef444b99976b9bd81c5c31d9d252e410cb329f9288266156ecf7a62a706. 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/QZTB22390724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3433fe3338740490516462bb5c9f6601398814fb799a3fef460ac03debbd725e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTB72357377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e1ec69872a9cdc1abe6bacb8b266b0a7d89e837a2f992412e8c06bafe201be. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBF2357760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8d5651c8715ff6f93f3551081cdafc9360a84de9df510075be1ac98cb54741. 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/QZWFR2336934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fbd215e1ceae8ac6ed8427e68fcd76adb3dad6f17033845316b7f50df8db20. 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/QZES92487801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ed7d0dbb58b68028ac105826bcc3fa5fa17544b1863c017b1513479fdd31c9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZHNA2403642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ea7836ba660507269dca7d68e5255d983cd6fb357d62a489690085a5c9d2e0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEP2476533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ac5189c88abb101a1a2cd3b11a8e8dce1623b85ecbfb3c58e3f0187d7313fb. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZWFQ2439084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9348043d5f3aef06346ffe3627a5a7c36bf59d9d23835a151a5802723dce51a8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZWFQ2439085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6716a7fd3b778a49aa218ad02c42343eab51a730ab784a19ebdddc47cf2e720. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:18:04Z), 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/QZWFQ2439086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66bd37024dd02d31717a07b581ebe51fa132adb80581826f0796660c92e4731. 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/QZWFQ2439087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdd7d807876ff7b580c96cce764c4ee3051512e441fb535d8e1261de3fc50ae. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZWFQ2439088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1dc1f6e59ca8414458b6ba790eee07bc2adb0184caf9e5889b3cc4eaa969dd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:11:28Z), 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/QZWFQ2439090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5a5db7d7eaa94d4799334956965fcb571617554776c3f8c01528dd14d7b97. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:53Z), 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/QZWFQ2439091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9561c2e04a7c05f721bb63aa6a247b906f783494ec8319f63532b415ef152808. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWV2493012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb750fc402e0e4d83b67583f1976f97fb6d06f47baf68e4c530ed17ca274c77e5. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZES52500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54bf08cb9fb0f9c5661676d4ca5ec75ef2b7e7dd7849d21adcc2438c19c7d6d. 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/QZHN72589982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadf5f114ce00410479c699534c94627327e6f5a470213783dc6f9a8aac5476e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6G2573789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf378bed95d8e4190fafa3a2c3eef266f737796fe4693f64bf2cd0c91ca578051. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTAU2342603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80250fc1914a6ace54cd9a69576a705e25c59c9c0811560c8b12b1e8f7c585a. 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/QZTB22203687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc666e3df91b47c6e8bb7e7c8ae52287b284bdc377971f7e51bceb6929603057e. 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/QZK6F2358832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a0b70b2647a47ec60e69357b8f3c60e6648f7dde629bdaf00146f33c37c437. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZHN52334049.
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 0x0b59d0dc2a7cff3165dcef1ea7f7459796bb48c4867a7c8f7d686cbf155e8958. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWFW2427817.