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 0x9dddbec809af7c97e9ae3274377c44fa7078ca589b768352775a3d678d0b1c6b. 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/5ccc589c-3ab0-49d9-96d0-c6a6bccda8e8.json and https://artists.proofprofile.net/proofs/artist/5ccc589c-3ab0-49d9-96d0-c6a6bccda8e8.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 0x689ed4f537386b3f03a9981131ec7d00120a5bac7485499841c62fdd9fbf585f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBHLW2400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0ce73edbdad6eaed5e97542e0169a72f64442f315152182cf9f942542c8fa9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBHLW2400513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ac1a9b802fd23ef5779ecf41cbe0e72845a3a835dc37f56c81803839cd7a02. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBHLW2400514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d84ac6e8c9397cd51cef79f35a058ba8eb33a8936deb8d0ef8aeb88f4dc263. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBHLW2400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeb666b67b23a1eb21b7e8d7aca640fc183356a708a7ca8a14a6e5167c61c0a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBHLW2400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09866e3f35f750458a342e4f7e5f186b082bbbd3c7495e8a53c2d16f82c2bbf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHLW2400517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e09eaa4a2a2a07308b2414a44da9bec05a61e3a2f07f3e83892435fff9bb0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBHLW2400518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ce08124f070d2c9a982ff555a3558741274b28abba9c51316c427120f9364b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBHLW2400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba7fddb714c8f60f9c64378346ca22953b0d6a5dd7ee04d6bb236ce23f8db6b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBHLW2400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443342f504586e63ea30eac7994cc6db26ef754073e714f2005d6f3b62077b90. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBHLW2400522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d0f0b4f6053fb3e3ba692523eeedc478a5b040f63fa2fcbf1e7cb471b75b17. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA2B2318007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e65c6e2dbe7d9898b64c0820400b75cbb1bd596e4d74adda39335ea875bc5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA2B2318009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739bb68cdde046f8c506cf6d2015836761ab5c558fb93af842efb18a9ee2120b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA2B2318011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e71ca0f84d6aad6b52ec308438decf16ab7aaf3019a41e5e4108c325faad4c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA2B2318012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a78b70325d87a8245c139b5ef59788d532c7f27b74f7f28accd68ee95c21bf5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USA2B2318017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e64c4ab1f0dcdb4bafe4e6b84eb73331706911f725ea92ae031eed725d5d75. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2B2101089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe2dc5dcd93ec588cd9286e2c73c900745a5af562c512c0ba7b03c923ce38ff. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2B2101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacfb1c9b3db8ed68ce1d112af04ae7781ccd8970234aff60f36d34874e08344. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2B2101091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4574f687941e615b391eea3727c282c8aa514d86c8638ae70fee920aa5ad1b20. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2B2101092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8735647186ee71c104794647fd849cfff130283b3509b6aba1b4a451a79c24. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2B2101094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6836757aa7b6bb5b92075bd3459b0392b9ccf166af524c4f6e590b51dc64f8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2B2101097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2ad94fa313caa2a26f3d6c9854bf44592fcccd98618f699f8b77dfe4203a2e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2B2101098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275c27b5e5b9e09c9bd70da2b57838009584ab9784eedd80592f75da7a68e5d0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA2B2101099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2045ccbac41e3677c830977dac953be2d7d35b12ee8098e15a8ba2c346ec392f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBHLW1703266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac02b40284fa9fe4591905b17456efffdb2724bbe57d51bc63082a789c5a669. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBHLW1703267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f35bc80b75bfce69d91b9cc501483437e161fa0b3166cd820c65860d1a18bea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHLW1703268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62565dca88c20a5b8ec6fe8f212e0cb2c93e70c35febc186b45944e72ea7cd1f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEAR41519868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ca0534afee735180f9f36285c1819778e7e10ac731ed95714dfe16c17d659f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAR41519870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20761043f2d48c67e144e518847e7974d3b28cac357855c5545cedf57beff38. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEAR41519876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23c46ca3aae8a198ca3eca659d02dc3e91d30421259c8bd28a28d803bb9e2b8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEAR41519877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e6d2af00fc0ba49068484786ddcc3be1e07be3abe6b735eeff8465fe60892. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEAR41519882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc919efad20efed35f8da058abe6602e2ee4fdfa6e88ecbd43dce0addcd6cbba3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB8KE2405478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04096cc4eef32b2b8a6ea6732337b3f7c4b3e89e82bd8de0af065563f51cadc5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBLV62321037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f3c87cd8d5ab27a6855b54a38b7a1e0c78fa170f84bfaf3c8bcbcd4b1d186. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBLV62321057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe72cfea489f91b3693675da126e49378cd3c2107b456e98d83a14e1a77f9a2e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR10S1958608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d0e0b91505551bb707784696372ce13f1d540218f5cb56d69d9740ab74a86b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKF4T1600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638839a20bc2359b7b07fb80418b609a3008378878bbbde009f24b5a0ed23d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKF4T1600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e8156a48cccbedc7a335b3bcd50262044ab1a14d0bc2cd18f9a8f68ab4c60e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2X41874157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661f2abb9e0f258cbb28aed7b4b1c0fa51e60f5a2ec774c35c096ba8e97d7188. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1547722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee648ae347ed7150cdad52f128e07c9a9af243d2b08801b00b17c3d6d3aac49. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBBPW2400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4689b7d84bd175738479533a8201fa76551d3e810855b9da29881bab66f069. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBEXH2100155.