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 0x741204cdbe47e68205dcbe797afc2029857171ba96c69f566bf3b68a68ae9c7a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/601fb548-3687-4cdf-88b0-a6537fcf9148.json and https://artists.proofprofile.net/proofs/artist/601fb548-3687-4cdf-88b0-a6537fcf9148.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 0x358e46c103157d94f2e8526d4d2c7e8d2133aa0616d1597445b0874fcd38a16a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QM2PV1601174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6019ff9c609ef3ac05b8cc33f8b7ad3c7f468326598403b5ae49330f7ffdc. 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/QM2PV1630252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb683044d6162aec4556c608711f325846e8b21f48ccea1fd5f0b49e61045ef. 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/TCADB1793173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6be22cb34977623e3384e1ab88c5f26a1c3a4735a23d25c661b9fe07a5759b. 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/TCADC1750599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c50205807b86cb7efcfbd6d95190a3de4a057842b8c5a43e0b38db11b03176. 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/TCADC1796566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa709d2354703e57301a0bd7242ef87380ff2bd294dacf2a139b4fd51df9f328c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADS1863878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ed4ddfcb0543bdb210e7def824a317f690c2f5db3c2b29e41043a03bb6f61. 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/TCADR1854966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa709d2354703e57301a0bd7242ef87380ff2bd294dacf2a139b4fd51df9f328c. 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/TCADS1863878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7841f0e3f8a673f1cadef7f4c9b3dcd4ba93df8e08b29010d47ef1690dc0a70b. 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/TCAED1989818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a22f2180c5979f160db67b2e591cbc399b75e882887fc249d374fae9c2aaa. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAED1989826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16da9539babc4fea508628d116d0186f5a8db82959d50037c6b4fc9dcfc39df5. 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/TCAFA2085684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2f73265641536d0b3a9fe27455ae242b4bfd5a3d85ec63003faefd65ff4b30. 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/TCAFK2162801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a503f0a54b5e5ae703407f1a20a6d0ff0a6fac9f59557976ceef90b65d0952. 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/TCAFK2162802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7519c6c5892591f59c2ac3fca9effc6ced2349ab3f48720d0e96ac7d58ff19f. 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/TCAFN2131357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a89bc9f431465f593a2f3b765b32623e47a89324df132687ec429aff7596df9. 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/TCAFO2121825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d888d436b1a75bac6f7208dc4cfb1d037cb12ad6ad5eab8f773d83456ff2dad. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAFP2141093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7519c6c5892591f59c2ac3fca9effc6ced2349ab3f48720d0e96ac7d58ff19f. 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/TCAFN2131357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a503f0a54b5e5ae703407f1a20a6d0ff0a6fac9f59557976ceef90b65d0952. 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/TCAFK2162802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f67b6dcd303fca036695a2132e13f960af616389240ff328b6d9d6b121cecf. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAFP2167540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cf130e5cc0fb34ea6b29840b373b4d99dabf3ed7188d0c820baa252688f668. 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/TCAFX2115392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d7704e7c96448b6d23b8165a70739c9ed185fc0969ea457c4f1f0eb0cc723f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAGF2269680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194bd5b25db879fb187b3d56289ecfca472ce1d632d06d58194494835aee611f. 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/TCAGL2288014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b8e83c9b8f56b96040e5334a7b3809c3960189f9b467338fb218a997efdc20. 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/TCAGJ2271420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349196d30812effd7ca6e0e24c9cbca3f05325422efcc649b4d8ba4c112c582. 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/TCAGJ2271409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0536171e004ca131bdeef3d822bcf40c5d2090e8f3301629306d3eb23daed55d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAGM2229310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed5074341c4d0b8005f7011872b1539cf62709ac6484b016365b5a65b919d29. 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/GBCFB2300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d8d95f7c7e8fd254440fb4570a228e401451eac517c9f73e596ebd50bebbe8. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCAIF2411292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d30e1c3fba23c75fe0c14aff9dc14986a81e0f9e23d836fb434dd473025898. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAIF2411308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46f77a887bd622afa11389f1d10f652e71dafbdae04c90e891708278dcbe765. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAIZ2498748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb208e0a486204627780639b6560b0f32466ed2b5bdb38d962fe81ed65992dc9f. 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/USUM71700468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0625ce2bac5facb4369617c25246d4a47b479e9baf8d602e6a060abc524f6360. 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/USRC11801707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975966e77829e34adb97409bfb15185bc756e1b5061006b69384dba6f004f9f. 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/NO8WZ2204010.