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 0x7787c30f3dfa0e481d9f606ef251200f695959e5f819c5c903c94c7d833a3544. 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/58d8fd9f-602a-47ec-bb27-ad454b6b4b43.json and https://artists.proofprofile.net/proofs/artist/58d8fd9f-602a-47ec-bb27-ad454b6b4b43.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 0xf83e7bd2318cbab88bfb2f17867dde385481c4d2532be8e51e36af75d51f6da0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE49U1901803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23285bb6829828f2822924c342eba7d60dde4b5c57c6c51c45eade93b092f08f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SE49U2003301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d97dd28b0c16849f484f208b9bba9ef2978d2a234e7a25d24b672e1f76139f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE49U2005501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd02fc69ae7bb147b1b5860f0bf328d31f2d18dfd056b6b2db5da196f1be7c. 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/SE49U2006301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f03ecda693832e9b0c21e4a63965ad2741d74cbcee6f00951824aa4bc67df24. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE49U2110201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307f1e5017e1ff69f9abb792a125b8b5a5897f53fd070cfaaa8ee32e7d9866ec. 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/NL4WT2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe812222b03c00a05a2c1d12685f732017161b8291eb370e74516ec46b75c57ca. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/NL4WT2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c7651d78135291dace23b00ed1446f8a6f2d493de2655819d49249321305c. 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/NL4WT2000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9651e153281ec8ed7be5fdc3b8034fd4c1d811ed79ef3edfd6b9e900b22434. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SE49U2113001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f37b10b7626efddbd8833d33523f04a0e87f8e871637eb4a5e73999d0285c52. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE49U2216601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c848731eb14f247807886f764ce9744bf8099ad89c3112c9e767bdbbc0b68fb. 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/UKW3Z2201827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbc8c2f4b44d7a123481a908cf056d65a8884908878c4845379e56332a5958d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/UKW3Z2200494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1145334bbe49b1dedf45a6e4d30792ca9854eb856aee5883fb774dc1ddc627ca. 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/UKW3Z2203305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb008d1f4a635223d73872fdba86dde4ec4e9b08e0679a74479d6ed690cb98456. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/SE49U2327201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99ab77b0e02eb00a1c35b78bf491775f13c0dc5f24e73fa8f87eb590a7b0fb0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM6P42372119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cf8e00d8f34706e320e7e260810a5d6b89cd3d3897d565a503583a8a87fab2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QMBZ92314891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8486f9048dd08bc5be910553f6dc9ee5205e741f081eba224b626863eaf1e7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMBZ92314886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65cd5f6cac6f8cca8d9fcce231883782b7381eab865207a105bbe7456619293. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMBZ92314889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8121164f3ef066b47d47828b6172c88f955aaaab0af3d1c3a36dbd8a3d12c6. 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/QMBZ92314892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5417699970f28dbccff92153b879255b19cdd21ff473689acfbca61ee15331. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE49U2339601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14adadc5245db0b4180c60f7fed905c4188e1d574143522b5c2df1a8cf1a5881. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/GBPS85212921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e5585b473538eaf0eeb584ce02250cc445de652f302d4e6c05ffd3b43b859f. 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/SE49U2442501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da8d77929caa42e02fe77cea803a32725c5e8a195860d366dcb204fd364f56f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE49U2443201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6fd10dfcf8b2ae19d710e5c037ebfcc9f341a2a1854ca2ba61a3a792e5defc. 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/SE49U2456601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f6902ac9f153a1990f91352ff6929872602894f3e5c72afd20f66fa051a2b. 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/SE49U2569401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fa0a5a56218bbaf55d1991b52489f4dd83ae05b00f1359529c82189a223e43. 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/SE49U2572101.