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 0x22bbd046b6ab43463944b1d2d09f719d0ff339724c6688b951218754444e0def. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9e88c99-a736-4cb9-9ca8-53a00737cf4a.json and https://artists.proofprofile.net/proofs/artist/a9e88c99-a736-4cb9-9ca8-53a00737cf4a.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 0x22dd6be2a0013e3b65d71ad996c37a3111846b98db0b8158872452410766ca80. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/RUB422000454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c069974add102234a3650c532c56db4cb0d2adee1ba2231b6422c69ab7da3. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/RUB422000455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec3bea1ce85505d9a4594d55b5e9a1dc51faf4b00f84c164c4766d6de0d0dcc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:02:27Z), 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/RUB422000456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d777dc985d504642cf3aa2549071292f32e95244b2e6420edaefe8954024abd. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/RUB422000457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44ef9d21ed65d40db41fb61ca06cd24dfc9e04e82ec8cf4330cbb98fcadefad. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RUB422001605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7b986841b3e8022000350334af6a9f750d05161b4d8439301d7be99a74064b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUB422001606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7931f9029606a74955aeeb48fe29e7079632f5e323b560bb97bfeb73a5fe973a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUB422001607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa047e4b5403e1a26640c94468d20d6091f63322f899bf54b958edc56e19283de. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUB422001610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6da116e5bb94f85dbeddf10e17b4d0bde773f4b7be42824a9728a004bf19b28. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUB422001723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56385b692c3616f2467344c70b4fe68e4222ee5b2df21441d0b595acec7f6fdc. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/RUB422102123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830edf010032ffcace3f04a4b8626e96185637caf21c72d10ce91ca52ec00b8b. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/RUB422202465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759ae1d6cb0b420949f88b74524e1d14213ccacc885a64a40d92f4d51384a498. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUB422203256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078be4cbdf8e153fea5b4bbdff171cbb2f81ce3c0ece17d56540bbd5d3c9902d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:32Z), 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/RUB422203257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b01d829975ee2560fc5888f6096fc604d4898bb81bcab6a55e7e856ed04c9. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUB422203258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdf28cc01753ad3b6d2b8e2f7b99a4f1d06c2835dd97dadcddbc76643019557. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RUB422203262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b51b40cbeded6b9fc2a630d64792f9b8d67a4168330bfe41941db0cb5e1935. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/RUB422401088.