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 0x44f2a0e2d50182cfaf6b9fa16c60c32c5719ad3ce7884fa5e45d09c32458d2c9. 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/a9ff284f-76ee-4de3-8c39-386eb0ee0643.json and https://artists.proofprofile.net/proofs/artist/a9ff284f-76ee-4de3-8c39-386eb0ee0643.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 0xc1146d0c1a5ad41bef656ee029c8cd9bfc42055240a20e7d509c953530c0869e. 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/CH7811300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad1c0c3d21a55620ee883f24db5724e6a8fece0fad8d3461416125945d8585a. 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/CH7811300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa377c1a9d5e04b80815cf02fd2f34f05f7f5708f1a5411d241a00273d41f5427. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CH7811300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ced24a16eef4b01cdad7972aef2585ea184ace87fd2cb3c4fb9f2f653acce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7811300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387004b0333235ae00c0641140fd7d420349ecedd557833f606ed15f16071906. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CH7811300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f03987760c9a28e2f11b981b0dfd9f860bd2aeeb651040812931a51afbc9443. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/CH7811300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24a0620a09b021cfa11fd41a40bdb06d0ad68179b8949ae5e8c2edef20cf32f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7811300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782a103e6c1686c00d455a920a9f408a1a7b5e8c9126c48aef63551fdd1ab77f. 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/CH7811300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0032816fc2cbda0e1cd752c73f37cd3c91fe39e2170415a3ac6e7023c4f68a0. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/CH7811300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2410aa5d748d3b5cd46824cc53f532dfae43642f1e7137d364d2f1df0e587b4e. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/CH7811300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b6fad1de3bf37576843f266b0a312b0c70150cb6e1580429319dd3095657a7. 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/CH7811300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1740a4dbe1b6446b742adb4c3dc7cbcac6ba20fac8803921514d889ece0dc8. 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/CH7811300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ec266d9f7d9ae8745e2e90d22e92f8e1e8fd165eb7eff87e33a8e7bc31efc8. 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/CH7811300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a047b65d81de77423cf2415bdf8201b16a2172c64178e3a30179fea483dff8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CH7811300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d0496d579ef7a143cee581d8089bd492757ef29920c0e22952573c22e1d381. 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/CH7811300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cd7064ed94e4dbc1a7fd46d06c795a6ae836f3c124c81279c729415dc547f3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CH7811503645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6cf7a760ca22b7e6b49729e71421b8a068946a83be703ce2e5c3e34c28d1f3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH7811503647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113ecdbf3b0ba7d2b1cba80acb6450c487954254c39024111424791fb2da7644. 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/CH7811503648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae18298dfa73a0682bf1f3ed9e76226ac62160202720e019e4e93ebb479e50. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CH7811503649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7031a8633cb1626fae9572c7d9e9a8d130eb67ef1e74348d45436ba7cb3511. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CH7811503650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe5f5161dce451e221cf551eb3d6eff7f4b8a72ed40bbce300c243d74dbe6a. 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/CH7811503651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c4f535d43330e32c223e579c08c91e19a4438eba7bec4f22eed36b1c2c901. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CH7811503652.