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 0x92c8584402dc031b34dea1fecfa2c2f6ab4cd73e21b7863725f7c251907230c2. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9b0d633-423d-4b86-92b4-6aec0c3c787d.json and https://artists.proofprofile.net/proofs/artist/e9b0d633-423d-4b86-92b4-6aec0c3c787d.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 0x300aac0e9b0bce40dea4ffa214dfb81a0eefa7b3fbcc74d6d7a8e37ea3f78d11. 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/HKG732280362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c60b28e155c9bdd53c00ee7303c7f7a155044a98dd7654f899fa6e7d4402fc5. 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/HKG732280364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b7b61391dc3d445dd6845d84f86056dce9c2855b60f83ad62e8cb6860612e6. 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/HKG732280370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104c53f610847afc07319bb371706c297f67ff14ee046605c84c8ffba69de312. 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/HKG732280371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713136d69e4450bc167f8f9d9e95158ef935df044ced25261b6fb444b197c72. 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/HKG732280375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f4a21549a960f061e79b03ca0d3bcd3a60552aa79ef7d002385a6bdbb824d3. 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/HKG732280330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f61a73bc095f013efec11e6d1c23b5b70dda902ba3b986588c91a260e3d3fd. 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/HKG732280331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491744a8b178b3d902b04eaa0ac601c8f45c1ea35c44af6f2a58116edd6669ea. 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/HKG732280255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f12210a2772d47cd27e5fdc769381fa98799fe177b938465decef6e7244d50. 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/HKG732280256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64691eb7f40174a82490729816237d8fd0d2a25af431bec3684e4ec8d7f268b. 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/HKG732280258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee28e5eb4f3205e58190116b3ffd27f5179024fc4fd8cc50931957ca545049ea. 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/HKG732280259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa790b180af49eccd4749396ac6692e0d13e32c837a8b17eacebf39930f2a43. 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/DGA0R2309336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10005aeb265cec44014d18d827bf44253e132793c618b1de0967dbf012a7b672. 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/DGA0R2309337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20783196d9c7c7f492025991f51d637e67b18dce33ee8e124eb38b7edb675e9b. 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/DGA072155559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb288ab34f4a661df46de39652623e363b86f9486d8913a1830c58ef26bef9dd. 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/DGA072155560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fea0bea669873cb40d4534cd3fd06dd53e097a747e39eff7a51fa330726dd96. 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/DGA072155564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b9824c80db6b3dd7b4236a29bf24bcdf10ede1598b365c44ce3dc3a6c8bf1a. 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/HKG732503145.