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 0xc06ab94fa378cb873ec02a2cb1271860263596f827f7afaef280637fd58ceef5. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0247e1d4-fcb5-4b1f-993d-73e9c6a9d916.json and https://artists.proofprofile.net/proofs/artist/0247e1d4-fcb5-4b1f-993d-73e9c6a9d916.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 0x064dc79d7647d662069ea582ad726024179a3d0fee4db1a00e5dba1a316c97a3. 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/CNA131700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b081c87959933c002afb09da1bf8476325fe1dfe9955d2c6ed6fd28c37d01f. 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/CNA131700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26874296723fe4b7c009a75860c0338122db656680591a0fc8fa5573854a6790. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNA131700388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dd50a18c98fd441cda6335b9b44aba7ceaebaaa6a0f8f8111ef0183ae5a7c6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CNA131700386.
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 0xe5e1d087657bb86477f95355a53254880fa7815928b16d1fc15f2f8af1170003. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CNA131700387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b59da2db89926ca7801f443ef5bb69980b1cd5635c62f4e8518e623df814d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CNA131700389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d5165737975730d41969217c8344807b87eb1f7e6ba7656323f1ace50615c1. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CNA131700390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680c52031ac0e9ef33f2b09073e3d9c8242ae93056fabad687637e6ea22da75. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CNA131700391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb58c3ecb5d4943b121b11c865847d9fa636672aea0f123619e6bc96c88c8d37. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CNA131700392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf14404c7d5bd51508bbbe852edd409338f51f71c8b1d5bd9e03691d095cbf00. 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/CNF181600989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d32512a6954befee30b0396c5f1d44f397d59abfb28b0fcdece4ac1c81c93ea. 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/CNF181600987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c449f120cfae8d14df61c8e061bf1adae09c2f5ecda3af0ee11d5ff06c061ce. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/CNF181600986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9f16c6c0bb0713cd6ebbea56fb8879920c8e07e21c542615d9b6aa0acadf53. 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/CNF181600985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffed97e55fe71b24efac0823214468921baf2be460c3e4c6e4b9b151a75c4611. 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/CNF181600983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9ec5f5d5c3c0ff598a46642fde7ec71fead930cf7a5c7f2ff3e5bead45341e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CNF181600982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecd65aaeee2689e359232902a68c24e5eaf81c482909e37a8c0f84301998289. 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/CNF181600981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c8845646e49df2c8b638d52c21318040233dd4ac8f2712e1a47c9cb507e2f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CNF181600988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb570ebd444b1d1a6e962380721fd2aedcd29d3f18cb5bf3242b7eae02ea90c1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CNF181600984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a6538fcfa1055740e61ee0e3f187db38948a131763a7f250eaf85314afa777. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CNF181600980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab3f9c061fab445eb2d1ca41841ada690cef950a2fdf31fe59dec4a93c557b4. 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/CNA791800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0603180dd92425f177896e65193d0783b3141aab6b7dcf19ddfe9f0d20bd274. 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/CNA791800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6224a1ac5e9a53eea916e9fb4290a4cb5aedc182cbe2baf189257939f420dbe9. 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/CNA791800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5a882c61fafd6578e32b7f7ec01f55f4b18f743f944cdd73b9adcda1cea287. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CNA791800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff4f8983c9d251b6ec64b00ede9c6a40d8fa386f15b11d6e7df12c32c62593e. 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/CNA791800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f6ef15d7655cadba99a90b66ffac2c4a4c4fbaefd83beb3128f28e5bb9f6ed. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CNA791800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08533ea75bbea74614f03cbd2510b53a92458e092257647d7dc05c6fccca4a1. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CNA791800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabab6c2cb04e44519d4cce624b0c32a0a054b9034984b6e6bb97bd2dd6a8d63. 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/CNA131700418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7b8dc9de52d2ae4c9215ed9a801b6593c7ea2db7421bce0fd93b408e6c6d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNA131700415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8ea184d330543583bbfd4b11db6634708b7179a9ccc0f497d63c1720435383. 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/CNA131700421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0e644329030496a2f0c4b64eef3a9cb23937d6a307bdbb365183b07bd270e9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNF181700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1fdf5500d3912c4c873d0619903a734ce8851342da7d85bc6c4309f668fee7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNF181700286.