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 0x4d80aac14b0b9d4a09abb38083393a2df45aa9fb842511032b87365a93e175db. 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/a924c2e2-d5d7-429d-98eb-08f5007d88c7.json and https://artists.proofprofile.net/proofs/artist/a924c2e2-d5d7-429d-98eb-08f5007d88c7.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 0x54f646898c531d57855920c6ab89914d2cd3b29c99c3295820492494e515630e. 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/TCAIP2447182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11feb5c64d21060452e9092e9c260d9193df227fe1b66a9d667ff4791cd3f47b. 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/TCAIP2417627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5739f3dcd27bd8f387ca620064aff30f099b9dbc72d270e9d0b132d885ea2e. 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/TCAIN2417657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f69e3b4cf71b21aac9c6685f889e07529d5922ff0775bceef7fe7326144399. 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/TCAIN2417665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecec7d91693356fc144bf4a3cff8e44e8c7b6e6d497a59f1b8734193b7f86d0. 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/TCAIO2417675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89ba670a96ee189ac23ddc3123b7aa537e1ca331ee7ad077d4fc98b776951b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAII2454868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75abfe18d4af7e65fefb34ac1bda003cb4f16493d33e75da1a7e56cb7959cfc2. 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/TCAIF2421530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce19e5e2473d638a0dd0f32e6425d94297d38aa0b5a3251557599dd6f08a960. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAIF2414484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2e333c63bcddbce1db104b2f2a1e7d5aee916d7b0cd77e31a76aa452288edc. 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/TCAHY2439979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc39534940f0354c570c9341a3f5afd4efec1445b13ee0cc285aeac43fda561. 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/TCAHT2455429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1245945e67a86c2692d7c1d3a3d23cc99574d180786911833392e6fa29d3986c. 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/TCAHT2304872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd67995aabf5c9ea78eacf80e31d4f17decd12afbc987c46dff4b906ef8990c. 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/TCAHP2326234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70014983aa2324d922cf371ce880595201c07ed06dbfe6c2084698795fcfa484. 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/TCAHP2326141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226bee301ee8feb203a3c88eec2faf721c3c8a33d5cf51665de93924cd00b08. 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/TCAHP2326289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd70398c2b4b82b729bc8afb933778ccd5214cc55683affccc1ee2aab01e7e9. 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/TCAHP2326268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377112cd16c0e8abf566a0e4a8371880564029d036ca58356bf7d1915ef3004c. 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/TCAHD2338169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32399f167cd510ae8104d723b87a6a36b573fc0ba9501155e6f2a3bdad3ac4c6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHB2388713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7da84f1d2710eb2e997255930337bc68eed80e2b0b87a5190ff26f2189207ba. 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/TCAHB2388667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41766555dc0b928d292f4b99469bce59132f3016febb0b0d320f4daf98e74173. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHB2389009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d243ced12429b4af8efd702306168886c21d00abc311aa18e8174f367913268. 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/TCAHB2312138.