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 0x127d97b195d9442b7c9414a9aa3b7d23a8d7a53ed7b1e716da92a16ab71e973a. 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/529d3483-3d34-4e1a-8775-4e923e8cf1c0.json and https://artists.proofprofile.net/proofs/artist/529d3483-3d34-4e1a-8775-4e923e8cf1c0.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 0x5473c5f8cda3acda30dade6295fb04723d02db3fb6410c5e61e93cf4c21f124b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AEA0Q2203030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acea0802dc93d48dee8550bfb52722546f969444383ecc0b513e207137d85cb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AEA2L2255231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f87b2bd6fc3f2d5208b3ca1016c1579c1bace2f473808aa746d1d0a53418ea. 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/AEA0Q2216602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686fb407be2b60e52d5f633a3e74e6188fb8c541dea706a629f4ab1f1145e3c. 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/AEA2Z2448866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4916d13fac5607e2319126eb1ef7beb1004135511e1583e8b5dceef3f8de7c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AEA2Z2448809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945adf8a148f91bf57061b485f627b22592c43403139629e18a559b870896ce8. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/AEA2Z2454329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38581a20d2d965375b638decef67078484760b34ddb6d0f7655424efffc50565. 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/AEA2L2412964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a33a78ec082eb4d957aed0c05d87b6c77fdb6c0000fe11e954ceb248ada089c. 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/AEA0Q2498564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c0b6c9a4f99fc321c6805b4975dce7ad134203c65b626c3d64716202d3b587. 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/AEA2W2500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a16776330d0a814cfe8418d5ba20547a7fce674dbdb5919f917b906fd1632. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AEA2W2500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa346cabaa3e524535f8b0e8496d175f88444039cf22d937789323d6b19158b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/AEA2W2555727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1417607251de151dbfbaffa3b061070987009d7ee37c60ea93ae6fa3895c60. 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/AEA2W2555834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad69bc29bc04f6288e9fa3be45da975a7f511e8f03262a43535e0540d40715f7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/AEA2Z2557149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f31a905817773054648e386cff3a13946aabd8113d44ece80b58d46610bec58. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/AEA2W2594359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795c7876f348967a9d936601d78b9daeea86c358752f9ee56c6c07acb16e687a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/AEA2Z2560769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5ea6ca40608971f17e65d7dee7a072ea67e70e7d8430842424e6956bf470b3. 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/AEA2M2515319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206cef1b3cf92a48481f2a0b517641f616ef705e1445ba82a1ee7215e7a9bd46. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AEA2Z2573510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12b16e958f2b420e91a2d467ee92565807a1ea51bfa2f56db78fdc8107564f2. 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/AEA2Z2574055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d17c58242db2fc844b7f7a11e6ebafb0f4410fd562789bc2e9ec4cf23e3c87. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/AEA2M2518901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aae165359c8d22e2d9b3b1742f504f7bbca8c69d52d3cc5c019b0605079f4f9. 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/AEA2Z2574053.