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 0xcf0e2a43552002d9137eb209a862d1617745dd876cc816ae2c2e2710875e3595. 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/f45bff58-805e-402d-b2fd-d83a529779b3.json and https://artists.proofprofile.net/proofs/artist/f45bff58-805e-402d-b2fd-d83a529779b3.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 0xf2d2af005144e13e645006075a15be25b3b70660ca5d611478fa7074493d1919. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJZ2134858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843b14863bd04f13941e5a0d999186828f02458a7f21217138e71573819b7444. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNJZ2134859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56f0cee02ee49e69f175af6f22fcfc7deb4c37a60fb46d19b422d2607b5c880. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNJZ2134860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b49dd397231b8a7a3313a4268b9fcd821e1c7b3f66e648535ec51de7680d6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:33Z), 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/QZNJZ2134862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fb0db89cb408055036f36bc1a44c2d0f76f4e281b02932e193e88aa3b28469. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJZ2134863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674465b3e44794a0825d6686c0b15a21eee5031901579a87866eca1f9a5958f8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNJZ2134864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fbda312dbe34674ae4d34ee0481d7eb890d4001101f54730c5aaf87863aee3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:07:38Z), 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/QZNJZ2134865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39215ba9a5ba0c8b5773ae0e6bb2ac971c02825dbf6a9064fe42c5dd1897db52. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZNJZ2134867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd2e639229be11073f52497000cee07d3bda68936c8ad89cdb82de948ebab7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJZ2134868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f66e588a724819db57da31b033fa35662e9a3fe5148b62f628cbdfa0fe487. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJZ2134869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b918a784d216be70770cd0c79221995a6813166a972a0b138490f860bb5433. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTPX2139426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030345a855fab2dabcc8eb9ac89536580c507532ff38bbb15ec85e70a00b9069. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:42:43Z), 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/QZTPX2139429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281d40b9a1ef6780a4457f75aea8e464573bf90a6a04e359ee1d2f927f194d69. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:47:40Z), 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/QZTPX2139430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d64a4819e42fd7bb94e1e4432e26d1893aefa76559a21c5d5a3c70145745590. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2139431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162db1f143e2f49cf58237d7b19455fc75637d94a387653d1779391e2fa02b6c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTPX2139432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5040661246b51da82c0ee2ab407ecb47c1dac9218615ef53aa2c2bbc10852631. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTPX2139434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c72a54367609edff5a8dd10654bb86aace0d1a8c0419a462c069e2a2b62d3a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJW2257596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682abf546936db35f5418acfe4b31636bcceedf328b7ded4a3911706a1dba42a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:14Z), 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/QZW9K2345644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1407d7576e81e23d4434290885d4477f32c63bd6e0a37659e4feca3ae6ab3226. 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/QZNJZ2477785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc4599383cc18890a53a5c502e8d97e627fa6bf6de1a7fb69114927ecc4ab8e. 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/QZNJZ2477786.