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 0x10d060f231c946246e20e4e374ef7540920d74223448796ac2c796b0dcbc777a. 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/81207224-04d4-4956-b030-0f1f5bfc6b38.json and https://artists.proofprofile.net/proofs/artist/81207224-04d4-4956-b030-0f1f5bfc6b38.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 0xc2205882061b9eb9b9e9f76dcaa5cb5415569428bea222ac947c72d14271f7de. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHZ62212093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5656a86cbeb83328261f13a99bd8b4dcc66f72307b245c5dca2969008536392c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ62237069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5574e3fecd443f68c48207c673fb811c605c94c5a793ce4fa7a9c59832d44d75. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHZ62202156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a448e381533bde82b74921febba9e1fb42fa24152b54cd283ceaab07d1d18. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHZ62202157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19092e4bc2a528deaea195b159db84ce4a9d0cd0aac5d8d88f3d5d5b3f1153d. 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/QZHZ62202158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d76b0d9f2be75e5ac4821503da2e1dcc1d38eef9c0f8925632dd927600bffce. 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/QZHZ62202162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2df17260a881a5788f2298fa8c3404c91df8e227cad46b3bbf8a66b6428957. 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/QZHZ62202164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd044917d27a60a2b7908c3dc6b5fb336fe7455757e89e99ef3021ea527694c3. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHZ62202165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c0d2f4808302bae75ab709bafe513ad6f37f6178407dab3bf4d3c2df42e01. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZMZ92236418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2498bbe1ff9afcafeac68ab61e6943c60cf368da59b8e1ccffa9c01648e1a. 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/QZNJW2222826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530fabaf30864a2f1219bc24bae756bd64bd1e798998929260a6bb8342668954. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2208993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcfd5aa56799fc638d79dee84c4a6785cb03c3b6aa1da547786c53fe9ca7d2c. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZW9K2223336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5defe66369a09006f256e4e93538e07ba03c2e86be256cca17da166b9cb4610e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZW9K2299557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b70048da4b443d3499d88adfda8c6a78051b701163cd4d2dc151564dafd6b4a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZW9K2299558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3a3614a243ecf915d2261bfb496da1bf739f4d3ec082c776ccb38d3d303a19. 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/QZW9K2299555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df0161db33ae3f83fa235a5967c64c831dd11379c1897b130e0f7d8963c690. 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/QZW9K2299556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7189d857a17141222c979e400a9a179a60a1e291f605272003313347629e97a3. 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/QZW9K2299559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22004fcf048d2ff350ef26b450b598d5c7f15e0bd3bd1ded6f0d481bd27ec420. 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/QZW9K2299561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c839382854373bc41479cea66b5df7f1d139f2223d58bea12303c1f5bc2e17. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US7VG2309694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc483d255e67c1c67085bbf134c03fc43523e1f9a23ead19bd444d7af04262a87. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZGLM2325544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31058d7db6ab0b1b7867af4f7f57296bc18ca399c01de640bf58a59a8aa56237. 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/QZNJW2366839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd683f2ddd24a5a22f2db817a61e805d2767c4b63f5efe5f310b7bf22221f397. 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/QZNJW2366840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b47b82eb98564bfd4a0db1449b963658b0d5a2a10df119f437ec91d6ac31580. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNJW2366841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67310101d759651713e2c11caa4129fe0cacefb72a51872f12ed83720afa8ac3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNJW2366842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342a6d6dbbd324495cdd1e9524e4ec67508bb0b883f8a8fb9d518e7eb05554e7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJW2366843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99744405e9dd8de15fd98b43a4485781d40563ac0aeed80701a3cd0831b0fe. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNJW2366844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a7cf96dcd6afe95f2decc1a1387d1fcaaf3e53613a9b048c307ff1d2a99c91. 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/QZNJW2366845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d9aadd6f14cf7c980128fe5e3a367cb383e8aad4d028d79278a61f5c09838d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNJW2366846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28acb69721e2318e150fe5ddd57ce9fdf8c3c6c0c3f3aecf9529487551a11a95. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZNJW2366848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca46588dc6c16670834fe9720bb99241bf50b625bd1040bb0451a7c32371c4a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJW2366847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b9632adfafa09e08f0335c5079810ddb98b5ad9f26d3afcd0462ecf0202027. 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/QZW9K2343310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb67e4595c83536fd1e8504130b74e3820fe4ecc2603940aeb9c2c3fa31aafdb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZW9L2321262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406e2cd80d79f36a5809db9ef4d294d64bf9af1c07624aa535f9bde88b59ea2a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/US7VG2418827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf06151b3a466f6732a84bef1804dd48f8c67405ea4fbf260d5be7af496387f0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZGLS2401326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1946538e6ca9f04677c370896eb3176e9b9abed826c5f4278ecd57348d40183f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNJW2408068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e9195a60dac45e1debee95196e121f75f0e7e7a08852ad39f7f704634732ad. 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/QZTPX2575271.