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 0xf177f8f1ec334a1700d7478e4d208d489207caad248ce4840594554d77e6589a. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f5bbf6a-2e25-402f-ae9f-89ce4da5d678.json and https://artists.proofprofile.net/proofs/artist/3f5bbf6a-2e25-402f-ae9f-89ce4da5d678.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 0x76d4fac838530c92ca2f0a1cd873227392d72c1f7bb64844ec1ef16cd7263ffb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAZ2372950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc664444044b4540018fa2a8d04e89fd0edf1bf38f4d9fd292abb6929117bcc. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZK6J2075165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7cff078bd8e23d56b278784d78db8121167994922402485f997e701c2e113. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TCAET2060277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1eb4922bc619fb0b9863948ea13ef12987f30104c99914b7d5709f3b2ea630. 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/AUBEC2047654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3eb5444353e16b26c904bdb5ec960ec702736e89647dc7cd3db43bf9aca5cf. 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/AUBEC2047667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd912d4b67f6d548fb62c192bb4bbdd801216602e73dfbafb4beb9119dd76aff. 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/AUBEC2047655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8624d4eae02ce717c90f9406e2109cb292a8f002c64e4897db4347bc671df5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUBEC2047656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313465a38cbcb2a7affe587c4a21604f1a2429b31d54a02164cef9b8c4cbd421. 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/QZES72059169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2188ca095cc4555e0502b675cce313076ff3e2386ec4bf01dc40f03b3c1706fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWX2045162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf703ab1a40b0847968d13d0b12143202cd1d38b950f7f2bbc6cf0219cccd9856. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWX2045163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62641214e3e82182d27a826cb1ca370c6e228debf5e74509eeca15958786fe2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWX2045164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7160d2ac904940a0b5699cc3ef0bcc591fef86ceb2fbd6347518089c3a5b2f. 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/QZGWX2045165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb0b3630296d26b8b947e9b24a14aa99a6a3292fce34993e41858c1a2d24e3e. 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/QZGWX2045168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d10d812d20016f090fbb7b12a904027ade1dd10d7ad0039f8667968def180. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZGWX2045169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b979548b1305b6a33306be725c6de71d6b4879f162b0d2129903c1ffe50890. 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/QZGWX2045170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a2995a516cae70b847e6851c82fedf97b0dda01501f9a77fb965d4c759107a. 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/SE5BU1888236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e91763ff887c410853f00e97747c82cc4a09e41060337a0b0873ede7896c6d3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE5BU1888237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ef14e29d970b98285be61ee2eb913fc02ae6c3e582464dd4bb3cac2c7aed0d. 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/SE5BU1888239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5a73855493ff912eb80302aff88ae92d82d9a3d62d226f2b6e482b672dab11. 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/QZJG52216502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3eb5444353e16b26c904bdb5ec960ec702736e89647dc7cd3db43bf9aca5cf. 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/AUBEC2047667.