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 0x9e28b8f83abbc112a6b1526dead5fba403ffe7474f63432cf7165ce55d835b89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de470472-c1ff-46b1-b440-7f5de96aae0b.json and https://artists.proofprofile.net/proofs/artist/de470472-c1ff-46b1-b440-7f5de96aae0b.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 0x2b37149a73f5f97b171431248b77d6cc8c8d9761ab1b0703c3a6525f40a6b8e0. 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/FR2X41951142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2600e8939f5f7f65784667687812ec525d0d5bca93554dd8407cdd455cc131a2. 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/FR2X41951143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda09862c0df417e5d9be294794121bd7e9592db3e6723aedb62ff96ab699a95f. 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/FR2X41951144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c827e062d81d138afff82bd1604435a54d2dddef7910e10f1758261a1b07f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR2X41951145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49a04575e657d132c0b3764647729f7a2e7b28d07340e6f912e8de4522e7efb. 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/FR2X41951146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c10043e3ea59ac919cf2d325903bebfa77d008fc2ae9a59039335fec9ca36e2. 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/FR2X41951147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd81c37287e2da253869a3dbc85c114d44d2ff243ea3075fd200a000a42be3e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR2X41951148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac6d7039e5bb5794ab3513bdddca36567d06498d6d36348f60e5b0eb8f64e3c. 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/FR2X41951149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fa43ca78f1163c851e07752e22981929bd6766540e12ed1c362f1ad0806926. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X41951153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb01dae44dc344daaff0d52840605aa1d2f836ee4819fd173f99d75f64914e4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TR0012000408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab6869856ad5a13bc137d7aa218edfaa063b4fc1cbc9041a31c44b6826f16ab. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR0012000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca154eb9afc0ee011dc3f12f9d59b7d1918d2bcb02f6d8d3d8c4027e6f12b4b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR96X2139171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf932a6913fc190b2f1f6723f31edef2934dfb5d1d93f81825fa4e3b13436b905. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR0012100411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b14bc2c8c71d5b8bf107f727fc9afece092ac3cfdeec4d9a4985f7ddd9ef9db. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TR0012200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aab3baf777050e33a7e926555ec3ef2a572d9684337ead114bddfd068894f5. 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/TR0012100103.