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 0xcac8489920d67b3bf87376dd6b6b541ffcfcfb6962f768251db319e7c885c0d0. 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/0bac4960-d5d1-4a60-b4f3-b1f722e05bb8.json and https://artists.proofprofile.net/proofs/artist/0bac4960-d5d1-4a60-b4f3-b1f722e05bb8.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 0x8c32357d6905f2eaef39aeca85da69bd625c2a30912547fdfd87fc5a1ed085e1. 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/USANG2467557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa276d1be0cadbf2994a3f88bb6ad9bba77247c1aaa0847b2c47b6cf933651233. 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/QM3DF2412254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f3e2a41c735954e43753eeca37cadcd9f8e87445e3a0b8993b6fb3ea0a5058. 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/QM3DF2413967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c8c49c1a031a58500021336d2a052898d5e33ee433eb9e3c8553be4529d27. 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/US3DF2506352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96f40852218e7cf87d379c474952c2195fd56315a7ce0606d5e8fa0ff2d0b4a. 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/US3DF2506353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd0c5b36dfd03bb8fb7374964c062371bc31e0ae13d7a34f27a8cf45b53fcce. 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/US3DF2506354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b9ac8bbbd2aa70ea0edca779a8e1712f4185e4bcbd149ba2cc647cee79b321. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/US3DF2515488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932541b8129bb0beea96dbb5195db86cb27d8f4eb7e06f67ea94836c2b453f26. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/US3DF2515489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787809a938c652dd7789bc7d4b5ad0c1dca458d030fc2b60b8ece6c4c1174d3c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF2515487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad892f61ca59fca854ca2c82deaf8e4fd9a1f0a8217337056299e5214d43ded. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2515486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11bd3bf2de3f685905ab62f4bb686df08c10f5613efad55427284c5b5cfc2d1. 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/US3DF2547865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2d533270919c86510acd57cc82f89de7b20e73d70f3c8b16d1680e904bf4e6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US3DF2553108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca787a03e28f30154b6a792b2f6be90639a016b2e97157e759a416689ad80ff. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US3DF2553109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b800e6a2aa091c0240f9263faacaf32e6832d867c08df6c9e288290fa319164. 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/US3DF2547864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11bd3bf2de3f685905ab62f4bb686df08c10f5613efad55427284c5b5cfc2d1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US3DF2547865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d57f4b4b1a6b904eb85514eeb25b0f1baecb9b04ed90e907d4cdda58e33bef4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:02Z), 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/US3DF2553116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8c95a3315f24754600914de624fdf7c24cfc14a8fa15e48c290d2e713b02e3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US3DF2553121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f24762194f98670acd16e26aa414bc05a396636c4376804624818e2bd8983c. 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/US3DF2553123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd617be6e9e0249b9533bdafc26227ce2e860dd8e00fa58d04df5cec9b4797. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US3DF2553117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b800e6a2aa091c0240f9263faacaf32e6832d867c08df6c9e288290fa319164. 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/US3DF2547864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e2850cc1d1141f573ef13e51ab9b71385e5ecb3c58f990f48b6d82abeaa0dd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF2553120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8533aca7c21280566e4ddd38bfcc4966cf6c775eff1bacdf92f349fc00153. 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/US3DF2553107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11bd3bf2de3f685905ab62f4bb686df08c10f5613efad55427284c5b5cfc2d1. 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/US3DF2547865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd087040163645c475f076cc74b7b6927ed31d880951fb4255c5f557e08a726cf. 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/US3DF2591769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312671c5491f4c82871014bfd720e4b088296799bd460c68cf9d7442f19fa85f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USANG2502155.