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 0xd3e33ce297749a5578bd4858fba0206d387f0d3f747d29008634e1877d8db132. 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/3a9737d1-06c1-43c4-b15c-f412f4a854d5.json and https://artists.proofprofile.net/proofs/artist/3a9737d1-06c1-43c4-b15c-f412f4a854d5.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 0xba4905d68c934676d083b13dfeb15aac9be478c02b68726dad785149bce5dcf8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USFMT1507101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97538c0f31e2c6531232bad0af470568e1fbaebaa3ed83ee973adbb3bd657d80. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USFMT1507103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf9549e36553df2cd160d23121fb281f675786b060734132ec85803357c3a24. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:56Z), 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/USFMT1507104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9b9d9052e244ee2908263b524e67c5772f49927074acc08d83782b67497285. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USFMT1507107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c627375e9c775a8e5937281d0ded7f4a1ec43794e769e66c020d4fd8246c83d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USFMT1608105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305e07962a7bcbfe5a56d8b7300074516a02e679dc145e60d276e28b050a22a3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USFMT1608106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ad1ad95e6ea48b0b9895df13e4ea8745d91f0eda1994f2f019352ae55f2e79. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USFMT1608107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f78ca26375c1b10a78162907cc9a92b652515d39aac65c1de5469d6a6206a8e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:06:11Z), 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/USFMT1608109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f2a6659e40ba6bba7299741b708196a5209114ac5d9d83721f3162b31fbe20. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:35Z), 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/USFMT1608110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8902d81babd455b7504fe82b014ca3f3fcec1d73131c67d1903a610498ef38c4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USFMT1901202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe578029a0c1f88ae703a512f98634d3ec832d064464b2c45e269cb078b0875a9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:28Z), 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/USFMT1901203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39465168103b776e69ca97899ada90aabd25742ee21199acd921c5dfec128096. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USFMT1901204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3318a5f4a2f4ba31e3ce288d7f7f3f38c9f1fbb0ce0ee50d37e9f82872462b2b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USFMT1901205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55159a52f5420e95504dd700442fd8a6decdff34908f081ea666649faf343486. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USFMT1901207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75832942a18d4b0cec5249c273f6b32c74a98b0cd010859c1ae8bba335a9056d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USFMT1901209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce64c37d2b4da7bac8192349271c7d507a849f4a67eb96c8459f8f0baafe5412. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USFMT1901211.