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 0x650916cc8ab74bda0f0b7acff1c815b461f0695a19910c4ac5550ac512fc0773. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/447dccf6-2200-4bfd-aa67-88a57911e042.json and https://artists.proofprofile.net/proofs/artist/447dccf6-2200-4bfd-aa67-88a57911e042.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 0xb5988888af2802b71c6ac565145e004a6ada558fec2075593cb72e716b0c740e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USX9P0798403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf698ee44cffe104f00e2e6babe09fac2ff0bb55982276803de0158abd0eb0b06. 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/USX9P0798405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b150b92c7b9db573346736f6553fa1ee5954dc79509b6d94b2e1c6bb341871d. 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/USX9P0798408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ed96cbef56720dc3ad2aa1042c08071cca57fa4efee07454427dad9bc2490. 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/USX9P0798409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111a2fb145556156e6f736f1bf1b45075a30fdb1fc0ad8ed23042f75a014f638. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX9P0798410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84238c89becfd6f4712a70c646eac0e105f84bbffd5ccac5c0e06d863c5dabe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USX9P0798411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a232e1c183ab2b9858734aa3c5823fa31df8ec8de0fb7f51d47ff59af144b84. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USX9P0798402.
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 0x22231bae2aa444c2658444a516fb10aaed103bb0256854c927b5f291df195231. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USX9P0798404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde475fc86791845789b17c5796b0c4dee8d2a0dd4f8ea7fbb344d3549ca785bf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USX9P0798406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7460d05b844aa0d124825e49939bd178c686b3001e8b6e7259691f47a6f859c7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USX9P0798407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb2c0b22b31ddc2cb9addf3d4df1a39ed18fd0635469acd22195067adcbfa25. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USX9P0798412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd876f090ebfe58e7bde6d36fdd109b7a0bbd5695c65c37eb5f14ab0586c7f4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USX9P0798413.
The Ethiopian Millennium Collection - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d481a6ba46e7b7f12ed4938ac3c13ea75481add3837aed1aaddb14d48777c. 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/USX9P0728112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5c38404586b6ef5a1c0b2d3e86bb1ec0f3626de40ff36028e244ded96ad929. 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/USX9P0728113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50a5b772e8434445b27b85013f1652e9a1663cdbefea958f337507f93700e2f. 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/USX9P0728115.
Shemonmwanayewa & Fikrë Hoy, Girma Wolde Michael
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0c38b28c776af47fe6014288c4bd4075a50324a56abaf348c72509a30f653b. 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/USX9P0728116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb0e80911cf65e16a700987fb0aa39b9f2acf8f124c777637b31d1842e36c2. 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/USX9P0728117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd578675099b5675551b234b16a291ccbcfcf47d8983654b2f7054607013410cb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USX9P0728118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099279027c7bb5eff9f45dade668cc79dbc6e7b6d9ef6df51666f3150d349e1b. 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/USX9P0728119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4687f3618df5c0c20be9af39c0622f5ea9bb83a8edb57ba34c8cf4e7b36d3ef. 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/USX9P0728120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591b245a56c07068c99943ac348204afea2f9937afd7ac6b054623195b6fa7a5. 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/USX9P0728121.