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 0x681df8bae4f3a02fe678ae1e35bd6a8adfb5283677dfa8d36751e919cb9d9215. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95136cef-96b6-498f-955e-721012e61025.json and https://artists.proofprofile.net/proofs/artist/95136cef-96b6-498f-955e-721012e61025.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 0xf7311857f451b3dd4792461180ec5fc998a6341f2998cefbb36979668cfa4f96. 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/JPW561804136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8261d83f892bbbe35c5f067d617f5a29580d3d4545c37dc1048a11bb1479fdf. 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/JPW561804137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc5b8393125310dc607cbd146db84e60da046c9fa03b4af5738ba69af097705. 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/JPW561804141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae3e0088d303eacd29784953a6edb4976179652d0e7b58560a0631e883896a2. 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/JPW561804142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0310ea0f12223e3dce9e41552843f4bb0557ca464b33781099ef41a80ccb5c17. 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/JPW561804135.
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 0x1fd518e9195e5355eab3604e7a3b19d3a481e67872c8d23ead3b0518e70ad999. 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/JPW561804139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ebdfdbc367396a1278a3082822073475d1c497696d59fb5f5a98f123c1541. 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/JPW561804151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcff5a2532000afde5081730e6fc395a45be000fe9d58d46f2f38846d3a3221. 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/JPW561804275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d5f51bd0c2bb4ae148e7d7f5ad195a1a9a69a6b21d45e9fd7000c78724273. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPW561804276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee04a5f09273885fec4317c8ad3d5de4175b6cc63824212f9844542778a9426. 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/JPW561804338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303e31dbdd881d767bc976afe6f20a1e5427e00d3191360baad844e4d89c84eb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW561804339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52862cbeb48775efe3c6a8fa507b3c87401860c676e10509de3c08b54f8ab69. 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/JPW561804340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13a4b827756447d2fc3b27ef33ea4f6398dd0b0de6943a654760a3b8e58e17c. 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/JPW561804343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8682741c6a543ff9c3486f9906d68cda96c2da5043fadbf42e4898e18124a662. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW561804347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7114d11bfe8711cd29a443fb15322a2446553ec4cf7799d0c0c30f3b154de6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPW561804165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36057d8e79929a613c6c85370837df3d620bc6a7e0058d96947bb484bbbe1a71. 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/JPW561804207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbd8c8844ed11d0300533b316401bd0f7ba686f29f86d7f86b4806309dd8432. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/JPW561902846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9294ff2abcd8cbdba6a287b5afdc63bcd330d291440d3c331a0aa31598e9af. 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/JPW561902847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bce676f73b9cd836180615b4967be1ea334d27f0ce8041a62b44f3c9a93418. 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/JPW561902848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e040bc91155bd5dfeca6c4011d321081e33b2534a8d0a28a2fe6a20719d606. 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/JPW561902855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3ea60bb4dcc1333c9822ab6a578130a8e22ebd053d7d7056f46c362f44df14. 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/JPW561902858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac507083750c302f3894113cab49996985af785ad34c7ccc3058beab22c41b6. 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/JPW561902863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee7aec1f3f2fe8376c428054931fa89406af780decbcc03c75f146d95d2dea. 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/JPW561902865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a82ba89b5c4da68b3a389cafc4b12e3f62a65ebad10ba3135d2abb1a05f94f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW561902873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0b421f15a6b565a370f5bc35f2889a688b9d2e185b6c7757bd63bcdda759c5. 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/JPW561902920.