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 0x79283a5cd0a0d3fa3779e4164c7fd42195df3c50e5a4932c6276ce4704275c2f. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69a176fd-534b-434a-8a6b-3fe6f1401c1f.json and https://artists.proofprofile.net/proofs/artist/69a176fd-534b-434a-8a6b-3fe6f1401c1f.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 0xc51daa5eee1fb2e892b50b55231080961843d3a726e1fdc59937c8c070314d1d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZRP52255025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c006d11ff7371bfc3beabfd92eff9c1d7616e7252bf2c65f82956c43cc8b1b8. 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/QZK6G2123380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d1f1b02d08b6ece725900f22fdb23ad9945b6328584f57e54858e7577bb23c. 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/QZK6G2123381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe58582b6b0828484236c6f2fd173482a523b1547e3b5c614e0a45d34ead84d1. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNWW2143930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a01fef0cf9e0a92e910f7a1e0f9efad400d6194b1cb81d0f3a670ad18f3eab1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6P2180071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7257e6e895e7596540e45df41fb4190da96018897f50472d5a71548b8efcc0b. 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/QZK6P2180073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea7f71050fd72c438dad52934e8904a7ccecd4cc4bc03f86e69814b4f232fe6. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZK6P2180077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d62612c26ea808eda083608ce3852405b007db8aa770744140ec66276ddccfe. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZES82125735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f915096726c06e1ea063e157bbb4571e7eb337f5db3de9e8f4c063dcfd4c52. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHNB2462211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86352c2c001eab5c8aec8226a161c7032c5be228521819b654b6d9d573852997. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZPLS2274155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2c078e6147cbf75185830eb1b9b82daf85a262b3b4d255b52093bbef397c9a. 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/QZMEM2282265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a758b16c8b4180814bc4b51409bd1cac9659aa439db66f3ced006758d98b910. 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/QZES82241447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcd9e3906319200925660c574078a6b4256a07a559931632209d6b0ac5e0178. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFZ72289088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488403f334891ff7fe8d23abb3e88010802667ed2d4dac0e813cc9465705246e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTAT2107519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a93344478ba3ac749092fb2fb3f7bd292d777cd807abba23e661c447224c0c. 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/QZHNC2108119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd6970c2e7438594905f6c646cab1e589d8e81fc82f67997f636008fb373685. 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/QZHN62155095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9432d0be16ea22e297756581b7a3c4ba77ed9538468bf367397c79f51d09893e. 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/QZHN32173657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d62612c26ea808eda083608ce3852405b007db8aa770744140ec66276ddccfe. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZES82125735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc251f595e233fda21688a161840cf44f8931553cd72a8cbc163189f28ce70f2a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZDA52184295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ee7fa4b11ef814d666515e45921f8a7cd20b248715042b9537115fe579c25a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ32135515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf351f8e6e6b2cba464b9277f1095d14edc4d556624bc76e9caff71c8784514fe. 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/QZNWZ2040011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb493ac2ab383d20e8165eda6e02e81cb5f7c425b104f3597ecf8b7c283281d23. 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/QZMER2014188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be33e53e99cce0dcb49ab8cd5e2d82a03901d3504e0701b51a4f5b9e306d7a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZMEM2039598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e586c263b1f5ec099ce01daf8f19d976aa94d4990964beb9892352236b7470. 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/QZHNA2012010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d911aadde2bb941d62c1fda1cb5f6a668d963ff337fe3e30fddb4815097455f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES52045919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3cf51b3df172d90ff8e9bc577d49ab15c3395c47671e11df1c5b7ef7809393. 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/QZHNC1931426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499ec87c7ab2a634efdf549f06a57ae0296b5dc4f687152eb32c15c557eff10d. 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/QZHN71928643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116547e1ff82dd1ae40273e3dae79d912d8932dea9f76f7d69f35846a8e54a7. 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/QZHN41920544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c5f5a57755b18b31c0c12afd4c3f3e0ec8d19fbe3f7ded15985495da08cd39. 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/QZK6K2021211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7ec94a07d3b1ee56bd66e11b6c530a099fe9b2d68be7b1e47f7674ab1600b4. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZHN62066283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daf9bcd12ac829d769b893a900a9e84843e8ba6641f36e4c2367cb8161acea6. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZK6L2353746.