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 0xb042dd5365f12f96e4e2768071f3d9037e693249100c7eef8c2bea02646aad81. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e590f684-7b1b-4cfa-9596-d9cd99c7339c.json and https://artists.proofprofile.net/proofs/artist/e590f684-7b1b-4cfa-9596-d9cd99c7339c.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 0x969c4dbbc992afa4e04001d3a2bafc3a11e8a67c591720c577aa7d051a21c990. 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/TCAHJ2313460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939409cc690020d2651717e4277b74c9d49c6bb48c29dce3ae6e8f4219762996. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDZU2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7f11b2aadd2e59e84bc78c560ebb54e1fe790941698a53aeb5ae0f65fb95bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHK2386542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e10379f800706712821b8f315415bbd6839b81ca1083f3fd001d111c0f8328. 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/TCADE1787786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7ec31a01a5c6d72149b8924dd53ae970287cd1640e437662831f10ad9abd0d. 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/TCAHK2386504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa01d6e9e48ae4731459a69c794e72cae843a87ae61f3ead3044f892f38dfc7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHK2386511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d169353956275835f4030f8cd0518fac44c88cac0ed6ce030032a79cc416a. 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/TCADE1787748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7e7c46cf85f66fcd6a8172fcb1353c65b774ba3f0cbfbee759bb0a09b83a14. 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/TCAHY2406547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4919e2f361cd8ad91d85e5dbc50e212d3938e9dea1a6c7152833422b20d15f5. 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/TCAHQ2354126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d169353956275835f4030f8cd0518fac44c88cac0ed6ce030032a79cc416a. 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/TCADE1787748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969c4dbbc992afa4e04001d3a2bafc3a11e8a67c591720c577aa7d051a21c990. 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/TCAHJ2313460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d169353956275835f4030f8cd0518fac44c88cac0ed6ce030032a79cc416a. 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/TCADE1787748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2798f4dd2b619d56886675ce2a9815af092f56304d101dbef1edab79d4f9b7. 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/QZDZU2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa920518b9bc19ca18ebb4fe97b05c52c37f0ff267028f52aa514ab56021f06fa. 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/QZDZU2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c09608b3f3d8bf4d15b60c4e19919aa3298236c67809492b5fc11479b76be. 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/QZNB82033488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8c2c3196afe1657c3f5db9f63a51f3e769cf2b2c4aefadf7e65969a78c540. 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/QZNB82033489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab561eacb4cb126baeaafb4d00b21ed8bbd52aa856777ed7247c5155837d9f9. 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/TCAEG1930721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf46ee8c40c75622563ebdbc954c627d79552cb5370f5900586bde3728c472. 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/TCAEH1935045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d169353956275835f4030f8cd0518fac44c88cac0ed6ce030032a79cc416a. 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/TCADE1787748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b340984e959138afe59739c3dedbe3c0e81d1b8a282cac9c7916c08dceb053. 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/TCADE1787753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a7565308bbeb06eb8f72a318475ca0593b0cd5065ae4d5dc2142aa627da489. 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/TCADE1787765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8616bcc8c8273b1b63eeb3aaefc36ec0f2e6990c6e8e07d3fafbf5ef51c723a5. 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/TCADE1787774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e10379f800706712821b8f315415bbd6839b81ca1083f3fd001d111c0f8328. 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/TCADE1787786.