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 0xc5dbcace02af335e8d5ececb755b23c3790b55dfd79abebbea536f2548edfa21. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1d2755b-f978-42b6-a5fd-d7b230426a94.json and https://artists.proofprofile.net/proofs/artist/d1d2755b-f978-42b6-a5fd-d7b230426a94.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 0x3c48bf737d8a6605ad972544d716c380322943b6e7c27201bf393662cc0b1bb7. 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/MYFR11411823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f87004dd099681b2a8cec9bfd4249aed17b511b6ca006db71d28037f349ff8. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/MYFR11411822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f642c77a44916d6a73c3119d9613dc168378b257dfbcc0e107a87a9ea23b4a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/MYFR11411808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943f999f6c277e8367919dfacb1d4f4600ac11e8ec949a19ecc02360e4c5fac3. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/HKG732367219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b59aec3efb62d70a0534f3c1735fce05e6044ade0905081df099c73eb405e2. 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/HKG732367222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d21cceaa7dbfa0bab6a5908a99d448782f0f86a94585979ae111bdf8f57ae5. 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/HKG732367224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d3e7d4b8b2e830bfde71daf4794188a43e53881019b2c6fff2b7c1816f6eea. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKG732367227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3c7dece76d6de086298007a89d3ec8e1b0927a274f4f0f1b9ce93c383c6ad. Chain 2 (Bitcoin): anchored in block 957233 (2026-07-08T23:07:54Z), 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/MYFR11411804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570348c67726e8aee7d60172211edd0f11510df6b4463c30fbd0ce57f27986a3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/MYFR11411806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a05ace27e5472e47b0f1a6b8125443c9d3b4f56f95e0661e5d33597274492b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/MYFR11411807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac261103fbc7b762b8a43aff36009a319748836676942155fc38002f9378bcd. 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/MYFR11411797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb27f68cdefa9e6eab9008e2c905dcb6cba2282e584227de7c087f1248ad9e27. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/MYFR11411839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159b88b95c545fc7e9971ed8ee4b25d0eeba584cb9c3998348a7f3b598708368. 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/MYFR11411809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2c7e427cd375a87be52ccb4b9aded07daa6a00fb7b00e49243ab02c54463b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/MYFR11411810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b097552748febf61cb8e63c58e02370f3a5714eec1d337c3265355023c3fdc. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/MYFR11411799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bb8a10dd197fc6233a644ef0bf321759e15b2771470400f054c35e196a08ba. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/MYFR11411837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f642c77a44916d6a73c3119d9613dc168378b257dfbcc0e107a87a9ea23b4a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/MYFR11411808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ddeff4b0664ec005a059cd0e5a94eb1b8ab1d737c398f07efb1d39dbb6de2. 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/MYFR11411835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9778a6e1cdfed81b44ffd41477c2ba66d81a766920c30557ed4684712fe1b0d. 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/MYFR11411814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96e62cc5fb8fea2f1aa7bdb94467ab6caa305811adc775309b3e0b0db4b5c2a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/MYFR11411816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f61e9a08e7edc146e04aa6d35def2eea2b6bf0937537954d5bff08261faaf. 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/MYFR11411812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809770186c8172e95178051229b498ae07d27718ac0052406cbce9252e5a3ad3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/MYFR11411831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56009798151a322a3eefc0d2bac30020cc442248f0ee181c1aa47f4a86630604. 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/MYFR11411832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86f3b53ddc6f20e54a3c123175ae3bd26f2920647f6eaf5da5ea66b847044fc. 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/MYSW10895483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7050efe8d67614d94f4ed295c75950e3fce5a1fe4a3d850072e23012596fb252. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/MYSW10895526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80df32709ebd694bcf7cadf259c4378c6c5b56be853cf8ecd1723a4c32e23ac. 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/MYSW10895524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262699a8cbec16e91ac298f98fda3e8fe049a5a1c9aafe4761e2e44348cb4d1f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/MYSW10895484.