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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321359630cf97c6cd1f74442c673bac698fe4731bf671950f193e0820360ffc3. 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/18a2a272-8d17-487d-a378-f13b281214ad.json and https://artists.proofprofile.net/proofs/artist/18a2a272-8d17-487d-a378-f13b281214ad.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9ff04da7c31f2eaafcbf6e13a6e9586314618283b9373c93a4ee7a91885d6f. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAFW2195841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062241e9d40fde9d1401f0705a71d4473caa361769d07c2967160847b96f833. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAGA2281219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923f38b695644e012261e4c9958411af071e7052428daef33083a6c5eeb7cf3b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAGL2227974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e4c8014521e897bb898a47503a2c576beac5e601f90c944b0faa9c58ff7795. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAGD2224145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a754cbb0b7c9f9a6dbbb7a8442db08b9dd2414a4b7b48c03ebba3383222d817. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:47:05Z), 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/TCAGG2214593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923f38b695644e012261e4c9958411af071e7052428daef33083a6c5eeb7cf3b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGL2227974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21df5b817ddafbca4f28b12345ccdbe8c62b9b7692fa58b2b43a37efbddbe622. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAGQ2216584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df47a4f7097fe8ac293c6e1d1195ed0c749f1d37b845edf5560931dd9950567. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAGS2358702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9b475f16e95d0b1387ba4c428db5222de5b46949556d37900bc29d9d8dfbfe. 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/TCAGQ2216525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2870fa86b53694ba50e17462876613eadb4c335b6e3c60d106412a413f5448. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGX2372138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab3acef1fb205222b85287479bded45bd9186bd400cc131615c2866d79fd594. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:24Z), 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/TCAHT2460904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea22a350aa0374ecdd87eb008bae777f3efb0eb5f41039c4655cbfe1e40ce71b. 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/TCAHY2478864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41a4a00e2d4b6979b64a5b83c06e63c01a3ad6ad10bb99b7f91dc941aca4878. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHD2368440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab3acef1fb205222b85287479bded45bd9186bd400cc131615c2866d79fd594. 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/TCAHT2460904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd0466353f47edf32953d76ba7a942691d31091852a08946a9f149744744b93. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:38:53Z), 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/TCAHA2370198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03756a694f48cf536a27126b7e6ea02e23341542acc00960b6d4d98b250b2d75. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHC2345254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2870fa86b53694ba50e17462876613eadb4c335b6e3c60d106412a413f5448. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAGX2372138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d95f130fde7abbe0924ed32c959d9fb02f13a6308e02c649f30dfbeb18b77e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHT2483531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa2deea118b26f1facb8ccaa31fcae23d787530b148dba20b662b68147dc38f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAGA2201368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10c9de382d899e0e3bd3d3975353cdc239d009d6473d410b34b0f3855b0cfe9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:41:50Z), 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/TCAHR2353714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1e3e72ad66f3ffcb461e7e1c0f7d07824dbbbdf6189e605d4a2180df390410. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/TCAHR2353738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61501e9a74b94e6378663581c5c9629c7500808e50a1e1aaebe46f4e35f82c8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHD2368424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce50d812484e08236b69d1fa8e3b6d47fb6a4e58ff93d41c00da157a26b9ceb0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAHY2478875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc5b28494b19c7092d90f5ada24fc9c7824a1d04a0250eb4bce223bc8aae8eb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAIF2482280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184a75be2f1c9612f50d7099727b701ace02b24ed2eceefe365a48f03adca9b2. 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/TCAIK2401910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bc8fd677d548e28ac098bc02ea003d0f592677d6e73f8a303f3153817506dc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJI2556488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7836a9ac9c4e3ef4438a18570164508f1938e57f3739dcb12c2658041a38605. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJL2518852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d884e87ce4107c80a4402320b9542e5b403813e9754bb8cb15f3d02c97dbb52. 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/TCAIU2470535.