thumb|A white alb under a purple stole (running around the neck) and maniple (on arm) The alb (from the Latin albus, meaning "white") is one of the liturgical vestments of Western Christianity. It is
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 0x8d93b9a37339cd8b1e80b1a9bc1923b1effee96537abf14d6effb16cf67b91ee. 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/118c1e10-4117-46e4-a598-3c9e690edcb6.json and https://artists.proofprofile.net/proofs/artist/118c1e10-4117-46e4-a598-3c9e690edcb6.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 0xafdac1c91bace494dbf35b0d2394ede77e93d452d46fba1fd2d1bb4c48ec81d2. 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/NLRD52413841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55286da04feb683ad82d761cb1e8efd57c663a79641ac5058177e5eec39acf78. 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/NLRD52413810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a61e312a8a98a9eec690443b18134072f5bc2f2e60b4740c9f801760ee9856. 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/NLCK42237845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3152994c8d05b700c25c54d484af90445cbba0c377a94d6a1d2a1f5f5aab366. 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/GB5KW2204535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e7442c1c64d97df026a27c2e624e96006f8062d1575c2ad8ae6614eff0cb07. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GB5KW2204536.
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 0x60d9c5da86af6c93807981502482576597a567cc2f88fd2a2c37a19a18a55f2b. 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/NLCK42216503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ddf15b671631aaffa4cc117365d7ee3fd8038387e3f15fd625bdff14721dfe. 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/GB5KW2102292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81692ca95ba0cf593fea6b33d2b77dfc4d5ca5445f75ca4dc6dfb1a3fc362768. 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/GB5KW2102293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eaafa7d3b203164ecf7e2b6d008c1ee33aa7d730e795a4ea9a93b424692774. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GB5KW2102291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a90709db482db8658e01285fe8b35cfa475da46a7c1fd3569293d5d2b06b30. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GB5KW2102294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b67edbd6ee03f308d655f89cdcc2104c617150457464f3673101278da3e99. 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/GB5KW2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82b682fea05a0925eb927614bfb9ea11025ce2c4bcf2cb37cb7cd3c4dff563c. 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/GB5KW2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fb6ca511aa0f5cbf659612113e49af10306d67c6ba1f03183bb407e986bb52. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GB5KW2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bc4e234c0c3918149f65ea3f6e5daf4ee9d002f2cf05976c391bd20a0742b5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB5KW2003196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7984c3a5e8296cc9df875a355315d2c733f7c6db9e9ce564be5c9609be3b6cc4. 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/GB5KW2001065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4c611e01d70c55c544f098b90cb62aa52d6c672a86b5e3783c5243952a997. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GB5KW2001064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98ee1a9d6b16260b19c97f6ca085876cdc54931ac621e8bd89adb6676cab95. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GB5KW2001066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a726c1b52b73542b44c238a126fc5d8acb9f389992604276e583e05bcbede1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB5KW2001068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ea4ac904b40a6c4651f156ed85da66c675927c2ac90d9b8d43508eacf2e70. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB5KW2001069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639763da59b69bbe15a83c093b0d0f1445edb6627086e40ec11fd8a9504841e. 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/GB5KW2000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc7f7d2aa644ce6a982e34562311ff8dcff24d10724e5d58f06544e24f2c08. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GB5KW2000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd22ec9d9850e029fff3dcf9b51614f5e3244d1b8dbbdd22d0933195fcd127e. 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/GB8KE1859755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fff3f006e8001a9394495e3deac8d2b5d06d6afc9efece800b283627430b59c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GB8KE1859753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f7734f044ce6a51ce0c12e804ae51df27bcde76765ac78e586eb44bac3909b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GB8KE1859754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f0479ddf1f3b1add56a7e864f66f26e556cdc103e47f31a90d4a494255e2e. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GB8KE1859756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfcf33a541ae98ced52c81191b452b4ff666d338f0984e46854ed87353c6d1b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLCK41053326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcbc987d4e78476f0e285f15e8d2a87e738fdee3aa957c9565941ac6e1aa3d0. 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/NLCK41053328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d23192e93711bb139b92ac1c010b5bd06e0f8a1c0b6d82ef0dacbb60070c9cd. 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/NLCK41053329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8301b698632bac0d3fe1d5f9618052d2d95453be155b931e0abae6837b231786. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLCK41053327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98b4d075f26ca1a10abe5ec2616c3f7dd4fcf675a3ba5f337b5a68a11bdcb86. 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/GBKQU1597070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd17d1e0dc832af4b860068643797021484fc7f2957a435deeded18f95069ed0. 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/NLCK41042874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538ddbf6a64bdf725db3eedcd4728289a6460530f2b15cbd70c0edd73bdbeff8. 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/NLCK41042875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f11d2645a206bf803fd73894235314e86a6f7f98365d727ee5695891c2245. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLCK41042876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9db88c7dd7e00acfc5ea2a3e3569c97d1fb2768f4b26d932ee83b3d13527c11. 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/NLCK41033090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4a1ba75b5188b0b770d413ed2531d9e76a3dd11008505f6f9c51ffea88529a. 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/NLCK41033089.