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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3c5db46c8bb5b4111123683d1a8a93f80f204a9ab308b4f030b97a70b8bf53. 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/8da7114b-3282-49e8-a183-b81d67ad7701.json and https://artists.proofprofile.net/proofs/artist/8da7114b-3282-49e8-a183-b81d67ad7701.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd90a6333381cfffffcfbe84affac6a405f177573d0720002098db8902b11da. 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/ITS782000543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43925d2c8c5f12ef5b297c1de0aa72e15039c62d5d0ac3a653994a01a0cf21c2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ITS782000548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14695ab14d08a4027c2792d79ab231363ceddfc84c663d84b9a1fda34dded66. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ITS782000551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4252681ebe2d726471e358efcf241983320b5af7c7e5a09747467094321998. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ITS782300489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bd6a5477716557ebe834f615f96ccea2750ad3855eea5898f26ae6b6e2398f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ITS782300686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c1e3d1753572fd349b2922c299603426bd149430af840d4149580cf5069454. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ITS782400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03e6e19a9fe33a29893aeeaf50606fddf56c1b7d26d3c482f1f25b3ff737d6. 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/ITS782400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbda995a428c07840155fddba05b836ace621e53682f37d17a23254ecfc655c. 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/ITS782400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95672dd409a426a250968e6e23b4f40fe041c65cf3c7d8404b6bc1e09421d995. 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/ITS782400969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5e2b95621248e2e190e7a73d3ec39f6932298aed533ea34205a59bf83188c4. 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/ITS782401327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb658eebdc24f558d2eb25f8e2c39c377ffd21219abbbabde20a76e7369c2333. 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/ITS782401341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733a8692ee148ad7a27b1cd843db53fac5986e54f4cfab4aa163e8be79779d44. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITS782401346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef1ec29e19cbe80326f3f09a620c0f2313ea0d05166fe8e62c60e3f58ae0e6b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ITS782401455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffba2aab0bc264e7a7102c3b769794c27d9d5e62d7f243f9267d6ac4ea99558. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ITS782401656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa15710a803799b887128bd7efb33b827e12a01298b486c6b90a1334b207eea7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITS782402008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972996142a781c865b006c00d35ec0c8a62951dc9a4df3ee21e624d26854921e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ITS782402152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc17618d0dbba694212c8cfc11f7a73becce938b665316aec73f61d6cedb59d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ITS782500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f4c5026ef765395269210f4754f82a538be8ca3d54cccc8043297d8044e62. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITS782000542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb658eebdc24f558d2eb25f8e2c39c377ffd21219abbbabde20a76e7369c2333. 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/ITS782401341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5e2b95621248e2e190e7a73d3ec39f6932298aed533ea34205a59bf83188c4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITS782401327.