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 0x2731c4507521bc30ea3850094bcde99b86248501206cb8a4873244f40f361015. 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/ab58ce4a-a3ca-40aa-ba2a-3574fb91c202.json and https://artists.proofprofile.net/proofs/artist/ab58ce4a-a3ca-40aa-ba2a-3574fb91c202.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 0x74a725c45030c88adacf0d248f7db6d9cfd104bc09d1244d685c86d3cd27373d. 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/QZGWM1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e1291b9d833c9ba8a1398e31cb77fc8dce860e2b1a53ef4e5c109b71c08169. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZGWM1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b165ed585b05e99af330b8f6d78f327792e7e4434d3f1e8b060fe38743e27cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGWM1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a725c45030c88adacf0d248f7db6d9cfd104bc09d1244d685c86d3cd27373d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZGWM1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffaecf41d58ae8925f887e7206c1a70af5a46d047fa4c555e31419623da6b91. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZGWM1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e1291b9d833c9ba8a1398e31cb77fc8dce860e2b1a53ef4e5c109b71c08169. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZGWM1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8924f3bdb6e598195e17981b5914014a8e40aefe81d5a3c7819719b9533012a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZGWM1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1946a24e5a2f5eb990a9bd6355f88cb8813f268ab1ae2e2b41479899582a286b. 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/QZGWM1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bc3007463b0d80ecce38b044aafa1feb9238c395586371a14de6f6e00672c4. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QZDA72215062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96295393687a47d6a4515c33d6d3a63abdc6c90babaf2fa58ab2139a69c93d7. 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/QZS7J2277447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132a3a6bea61271b0806c436620585d2ca4f5af2e5381bf61a5c919c17fcb284. 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/QZSYP2304175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bc3007463b0d80ecce38b044aafa1feb9238c395586371a14de6f6e00672c4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA72215062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96295393687a47d6a4515c33d6d3a63abdc6c90babaf2fa58ab2139a69c93d7. 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/QZS7J2277447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c879e7e6ef67e15219dda482a4cf4a1d582a31c5c9f8b8c4bd771227068b1eb. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZSYP2307449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dd9592fb969275ccbc0b9416135df62ba71d1a19a07950f0705a6b8f69ea3f. 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/QZSYP2340963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073b803fd118161e461a1d823812f03488414007a211dee1d1112a3691e9e764. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZSYP2393102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd18e0216bb4a77d0b29d508ce672b7d2123c1c45da0449ab71ac90ce7e927af. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA72532914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbd0c5afc3efd6f026976775a22b1988b37060a7741ac776734fe96d0ab445a. 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/USA2P2306802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9b4af3431a03c777973288656d7fb15468067671295ac8b5f926150caa515. 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/USA2P2325946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9b4af3431a03c777973288656d7fb15468067671295ac8b5f926150caa515. 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/USA2P2325946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9b4af3431a03c777973288656d7fb15468067671295ac8b5f926150caa515. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2325946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9b4af3431a03c777973288656d7fb15468067671295ac8b5f926150caa515. 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/USA2P2325946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e94f74b336a849dce3b683fee8081d65b9a2bd487920efd9ad71f86f101018. 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/QZGWM1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1652398da25cc8d7ab9f9a44a375a958b9e1337a782e2e19a5441ea32b2f91. 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/USA2P2472408.