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 0x1bcf3ba03541d16e004fe169173e7179071058941eb66475f61f669190546ebc. 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/d7088d42-59c2-404a-adca-1a3339f7ba6d.json and https://artists.proofprofile.net/proofs/artist/d7088d42-59c2-404a-adca-1a3339f7ba6d.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 0xc3172422324ff8d377b3bb17c9b3e22064e0a29158dc08530b3ffadc83373d86. 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/TWDJ52200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3a064ab9f261f0cab9b9dc5f988686ec8316bf29e664617fbbef258152040e. 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/TWDJ52200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26c5d63561283ac20f0c7c3e0503213e1ee7af724a7365777e8ff63ccad93d9. 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/TWDJ52200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee7c9d251870e01816d7a3ad30d1eee496480ca4b50164e27f2c9c014e905e. 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/TWDJ52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed78ae7e7c9eb2870f56cb8c51b69a403bca6eeb746948acdb19de6ce1a7871. 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/TWDJ52200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada074b9be2846014f5111b02f3f1897ee18f8ff49c669bb17c40cc1903608dd. 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/TWDJ52200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf810eb05e535616198e66af2616ffd03d72c1b5bde7f29991252e1f00fcd767e. 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/TWDJ52200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad991eb1852833b1c0bc97e4422fa6151767a5500b71280b8b0a52b812af0e66. 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/TWEG12300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b43d2a18f144e182fa761a55e5c50efbd77c0302e8ec1e69679e876cfa9a82. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TWEG12300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed6aecfa384bc93a3e021b40b044aa2ddc7f94df2e8c28047e3c9debf98153c. 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/TWEG12300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812dc1d88dda85525a54172c6b292ec116fb55801de2aa65ea9b4b1090c87ab2. 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/TWEG12300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a6a757929ead79fd0b2495a35d0acd3f408616a7bdfc60630243275429cec8. 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/TWEG12300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922df77db702aab453b270e817d62fe7df91efaba2f45c19c86382012e16d360. 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/TWEG12300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3af90ef64c0a3f230741f67f178274426e04f4cfe9f35f68532c80d3d7ba955. 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/TWEG12300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb430cca7df8b4183768d64364174b0482a841b3933b0013c1bc7228582754194. 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/TWEG12300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7144f636de4bb9769029ec7d49d4bb99a24bbf995a6f36870e4e3640bb02392. 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/TWEG12300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90440d744078ff766d6e61bfe0a433b3a6a32738621b2b186f5e35528fd393e6. 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/TWU712204111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8fec8d31561d721f6955042e95a5dff1c808b4a4cebeb0adde88b4562ff24b. 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/TWCT52438756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee7c9d251870e01816d7a3ad30d1eee496480ca4b50164e27f2c9c014e905e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:13:56Z), 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/TWDJ52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa2133850f4a9914d7849158d08dcd36c60a240b2501df17de3ccd3b82f3dbe. 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/TWDJ52400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda638a089708f9dd01cbff630738deac70de2efeeaaf1fc6165f17271c0780ff. 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/TWDJ52400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa2133850f4a9914d7849158d08dcd36c60a240b2501df17de3ccd3b82f3dbe. 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/TWDJ52400002.