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 0x1b0530287dd2e95951a9b21337b313f48b9e871867050aedf394c72063c1c8e7. 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/0d5ef0cd-3e58-488e-8835-4b1bbfd2766e.json and https://artists.proofprofile.net/proofs/artist/0d5ef0cd-3e58-488e-8835-4b1bbfd2766e.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 0xc6142c94ca532a528f221f25560f593cba30e51c216ec78dfba4f6cc1a00b902. 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/CAG320813904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc259aae40a23932524b2d96959d74c57dd8a8100ae07996d742801001f51a1. 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/CAG320813905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a40df5932639a541b3606b2592c7177da942119fe8262c10bc91a32c1e095c. 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/CAG320813906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd9f7a18757b4aaf3be1290b5bc95d551eb4f1f4b5efc3f76f546bc20fc6d64. 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/CAG320813907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaa03aad9f887aa8a7eae87a6339f2214b2d415d4a429d9c01b020a608b34d8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAG320813910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf102298f3dc2eae035f245735ccda7aa7e33bf09290e83ab2428790dd4e47efd. 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/CAG320813911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd495ebf9d5f733c30b88a6843961ec1f8078585e692f7115f4e25992edbf1510. 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/CAG320813913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17be84d24c6c807e0e72ef6eca3a005e844cb990277271244c5fee58fc1d38e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:36Z), 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/CAG320813903.
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 0x5045b4b27c5d88f265f667d01c3baef8e99bdb1eb2b9987955630b7562e438ac. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:52:37Z), 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/CAG320813908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb19a01d1f0453f79ede0f7bbec99c99dcc470986dce70a54adbf1b378744f8e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CAG320813909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeda3e5fb54cc280c9d2447d030b175beee33bb332a5982207044a177f0e4504. 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/CAG320813912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc937ab2239773b61b9f48fd97fbd168fe485701bf471025f8104220edc8277f7. 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/CAG320400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd201997ad4fd665ef211a55395fc7f2e363ef5d59fa4b323bb147128cfc6f39c. 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/CAG320400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dba49e6d0f72cb2c6bb74ec553b6ef657089770d34abe5f34a77e6d2cc94f0. 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/CAG320400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bcbbfd06b954e9cd56667dc9467e4d98f3e2b52581faecb47afbba9d34a3e0. 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/CAG320400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe569d850fabed25133eac35b48a5e99f4f28dda3ab1d8bf2aaf81f8c745926a6. 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/CAG320400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b58e5d406a3d9a2c1e3a648f834b13c77fdba24061850e5f8959cfbf8f02df4. 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/CAG320400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04e83b47a4383bced9100ad212b69f1b28034a7a1430a1818262db54c4013d3. 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/CAG320400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdb3ce394e44ec1fa542c1a8eb7175631c21e9b39f8a4f0cd13b4bcb06a5d73. 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/CAG320400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fb557b9de1b1a58d7c33a59cd6f1ab5c938f6b3cd4cec3af3fc32598daaca5. 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/CAG320400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c08dba75f2a444b10a5b8d8fb842e0abc4f6c5ac2ede528959b7d9251ffe051. 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/CAG320400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999415248a2f123515319f926e7d2ef1bcf066db2634794e36356c68a79c7089. 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/CAG320400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997251d42b09e2ce0a496b5dcd35b55104395d3a8bf05221c4bb5ce093157b25. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US6620500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ecb47c593b45efee568a6fb5d2d68a814c93a1583e564554673f4b6ec07c45. 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/US6620500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb048e436f1af6626bebf19d159aa276a13625cc1f7fb06bda97dce2191464c7d. 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/US6620500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e2eed42c3eed735d9e55ba0462561d4383ec34661fd49ef8ea3c25987339d0. 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/US6620500144.
How Great Things Happen When You Give Up Hope
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4581dddf3cffe43338e0369513330392e2c72e6aa41fcdbe64df924329954b6c. 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/US6620500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f755ef680fbf6bb9b20c6f52bdcbd57eb7c6ba0e82d32571f2c67a74ba3220c. 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/US6620500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5a38b84e86e73bd70b3959efc5529d5a8ca77b799ba87c314818368c6db1d9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US6620500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d6ccbb2af75d42d4420bd1dee427b33e5b8220c04feeb4d978a5d0ab4934b0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US6620500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba643d0411c6ca78f44443b04a2c5399fbd60fd3b32c6c17735d4346467d8140. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:27Z), 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/US6620500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a657fb0acc89d133b0fe6d870778771109cbd4ac39bd89aa32af817f85d0d7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US6620500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a39a18da27afdf2bd3a4c0371239d8d9907494af4a0e9b46af3c0035393df4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US6620500151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa04485a1ff9dbf0ea20f39951299769c62fecb22a00a90c4d6c190810f6d15f. 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/USY250925566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c1f35c6fd6ebcef9e0056fef0d594363577d32a5a017dc5da8dd15e58ad591. 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/USY250925567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1843f25701e287fe753452e61f3b8b23157bd3e3e9052b9b4a8e8c92c46064. 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/CAG320708615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4be098d083ed7190ca4ee51f19057ddceb3333bfd60c6468505662abe325c7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:35Z), 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/CAG320708614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddedd8b5f453475faa890069922590f9ea11c0d02f8a00b5535029c80a459c42. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CAG320708613.