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 0x833c8722a0eff8fdcb4762c390b7dae179fb67904029a4aededaeef30f9ddd04. 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/1b4e643f-b2c5-4b0e-8466-363a57e108a6.json and https://artists.proofprofile.net/proofs/artist/1b4e643f-b2c5-4b0e-8466-363a57e108a6.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 0x73b76a8536da6ab846e9a2346824f312cb9952014fd8bed4bfe6684a77419ba1. 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/QZUQM2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddf4ba062025d9780e328a4c2e056a322cf0ae497b7c5d1768dd201e9c01eaa. 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/QZUQM2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d080925978b80dd6d285ccbd0267d358639b5d7e16cd7391fb328fae25c335. 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/QZUQM2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1983d9ca813ac21631ade546153a6829f89bf31d5315d015b1168db0339e2714. 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/QZUQM2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c0477e29be592adb6a831ae78dd55074e1c3e91c67942c9dab788b88c8dcb. 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/QZUQM2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556505c912af53c487b992a24b4131d7e65fe5a4eaf2546e6f457a951d741bd9. 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/QZUQM2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba1c09df8e03bdf288e65be971ba91d33929f2dd5796b94668e7751429ddf75. 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/QZNFJ2401266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb85a67ae226f7fdfb5ffacffe83aae3dc07155a2b7a4a510ccc59f9aa766e. 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/QZNFJ2401353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedd2cf4684d252ec16e7983747ca22633958e29b1b7e29afab5f7982ac59d97. 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/QZNFJ2401540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc628bf9987b567c0faa86d3afdbd019aad85b92ec3b20073775c47a9c93a0b. 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/QZNFJ2106103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93cd08ef26b81819700c890d8c87b2fbc648999325f876603aa2e4e4b456654. 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/QZNFJ2401387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26508a8c8a893cbfeb5386346ca365c75973593968a672ec031924b69f40ede5. 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/QZNFJ2401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06689555ab43e58b639d4e435b8a3df0401d67c425bf349f41500bf33666ef5a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNFJ2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261414b90456581fc276d25e28281634d14eb837d0c619026d6d612d498fa775. 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/QZDQH2268745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13cd43ff3e401d89f2c191811810e88f4466447f31f1a4cb95ec25bbc0fc5f8. 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/QM6DC1900812.