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 0xa7a1cfc445d5aae88ae60b8c795b733f2c8872d0209979206b1ad4cc6f448452. 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/5f22ab44-0ab0-471d-9b31-7de53b346f26.json and https://artists.proofprofile.net/proofs/artist/5f22ab44-0ab0-471d-9b31-7de53b346f26.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 0x59e0618f23e6fed48eb45fe71fd4c609c781bbe31514680f7d71d0c79d89a9af. 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/QZNWR2390721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c3bc73dee8a41c41e47d2e3b53b8fae09ba391ee70d9b51ebfa7b96156d3b7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:28:38Z), 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/CA5KR2417358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42ae772223725559859692614abe0f62a2bf46c2b1be4e83aa694f72bf422c7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2439865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aae8111bffc6ff14dfb299d014bf1fde863400e40cc79405d45e09acee945c. 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/CA5KR2439866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c69a849cf90f80a5d80ce20da9f9640136ae3a77e01d9b1e465e3217c2eb4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2439867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7718370df5df4cd40d503c4a1bc1adae4d1e7bc8cbeae051d48b2616f706a3. 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/CA5KR2460617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe232cbdf3e7dd76afa1d255ebff693a55bf75032a15602308d381f4e30c1c9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:47Z), 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/CA5KR2463678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2affa0d4e9c78ee980bfef3c4c01f5eea29bbaf9c264083d5ed5c536d5b1dd64. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CA5KR2465996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9617ec1701f96199e0655b6b7120b0f5db64b914913c0918578ed10aab3faa0f. 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/QMBZ92474242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b86bd752cc8bf9b4e8fafca928d7f2d45ec721540eb097f3f4b292365b0c42. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:34:57Z), 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/QMBZ92474245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779781843a5b0d076f73246d93f9440d17d18d14e2e31054c1523ed00825360e. 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/GBKQU2496608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc526fe2b86b834c759067e68996bfdfdd0cc63cc2c0acd1b5ba7f7c7aeb4bea. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA5KR2504358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89f7bdaeae6b7e48d25f45b925983296f4710c970fb9d75456bf584008b7c81. 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/US3DF2511182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdb285f4220ee26c38c7e62de5a11153dad860bc329be87e75daff952893610. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:24Z), 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/US3DF2511185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932bb40ccdccfcc863770b5441f4d3081089eecada633412918b9a180f264060. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:06Z), 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/GB8KE2508197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe823d55e60ddba7536cd3115645151af51aaabc1a8286cc9304379d03f772d14. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:14Z), 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/GB8KE2508198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9338700a33ed74e2a856d3c9817f4ace466e8f1f126e90e5cd3145559b2cbf. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:27Z), 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/GBKQU2533388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093a6493b05ccb0c388a4d95f2c12b78b88da076445e4ce1921fc6e260474e7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:29Z), 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/US3DF2583406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c73c61110c23310b3024165a847f39e14901de94bf8f4b34d4e7b11b7635cfa. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:27:39Z), 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/US3DF2583403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49878e87048b0beb1b49f63169b7a0fbe864067ed357f301a7fe5a136e87a3fb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:44:57Z), 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/RUAGT2548787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b5a7ceaa23ef2689e3430abda1d5fe4cb61f436854c7a9472bd6af051b9a16. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/RUAGT2548788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c2f19d7b4bde0b63fcd02ef0ca92797ddc1700db3daf4719f4d85aeb808d86. 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/QMFME2589230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b49133a21fdc859e2c6ca958d048b18a4b190ee162ac0ceb2065a39d19d723. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QMFME2589231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bd46e57a0f17ed10640367e18445474c0a15f8c8873ed811f813c70aebc627. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:42Z), 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/QMFME2589232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82411eddc1992a0f4f5ddde2714ef4d7e72320a5f0a5c42d27c9b3249ff28f34. 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/CA5KR2596351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06478c006a58f86f4dad7bf0c3857fd59755e73c14fba1a6a770e7385c481186. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2440755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25801e8700465633a296bc56ca389c4656558acf8780d22708fcbd0de66fa670. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2440753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2da7a4a050cd619b5294fde3b938c154fb78dff2fc111d410d2feeb60147db. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USANG2440754.
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