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 0x0a6cd0faefddb2b751e4add491219f72bdea3653d598c5c526e01df24af76219. 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/ae1aff6c-30c2-485d-861d-0455af29e755.json and https://artists.proofprofile.net/proofs/artist/ae1aff6c-30c2-485d-861d-0455af29e755.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 0x11385ce33027f3cb6cc97ffc805fdecd5845ebfd78f9d08751590ff1e76b2d9b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMER2471433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe769e6b05e28503d2163f45f361b0162784c3658da900d530eff6c42b6d2bc60. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:06:38Z), 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/QZMER2471434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61fe98f05dfffbe1e1e21b26bcbb8c359bdcc012afb87cda3bfc9ca9b7b8dc0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:20:27Z), 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/QZMER2471435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c290bde21b228ecf785faa9a2011e31fb60745c9a381e6a2fac81e53b566eb. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:42Z), 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/QZMER2471436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9610463ed70cde00d655ae59ace2cf8fcae2e26c0639a74599301744797511a. 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/QZMER2471438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803d62e538082cc27be903f5bba2d65f05f04190208f27f2f07b14ad552481d1. 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/QZMER2471439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d65ce1f195239d049a71b49ee8fa9de6c20365faac66b1339b6181364e03f74. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMER2471440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51a7117863f7c79bb41a694e5caa8b174817e8f8c5157a2ba5466ba934e2037. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:17:39Z), 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/QZMER2471442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a587ef2f46a8bff47b4bf1e8f357a45d86aa4e7b1ded6e67ab4b7330532cb. 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/QZZ7S2413797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d20de28d11694a411bc635963520c814db4c178e7bf6a73bd150300dab6061. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7S2413798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d6a49c2984313c086b7df612ce3bb96910fd62cba228275edd43b53424307. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7S2413799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432d4f83f8c8f5e2abf103e7c1c62e217278a4c5dbcd0a66bcb00e410804b293. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7S2413800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11fe622cd460145bf252022635cd0d1dbd11bdc695e84a6c81a271c2de8147. 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/QZZ7S2413801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd58421ac6b0c1821fd58a0d1949cf3b1d415e5dadf8fc31d35a612f03b7f416. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7S2413802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c530853bb203fc84ebc27f482261d33cd3995a815e6e5eab826b6b0628dd33. 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/QZZ7S2413803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bd956816fb1ba4a55500f5baaf8293612a52f691df3f7a17f80a991ed00271. 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/QZZ7S2413804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c344e9239af0a69d42b605a86be900030e385193c28c095275b95768068408. 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/QZZ7S2413805.