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 0x72630b79993866f829c56baeaafd90bf8696a9cdd5a185a533d6259910aecd47. 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/0dee693d-aa4b-40c6-8f07-aae529776823.json and https://artists.proofprofile.net/proofs/artist/0dee693d-aa4b-40c6-8f07-aae529776823.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 0xe2bde05da1e0de698b49bd81f369d3c60e1b039bac1139a7aca7a8b9c77cab11. 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/BR66N1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee404f4b40839208b68b87f7ec55bf26a214c4989f450dae8d1604218df2872. 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/BR66N1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff8f84168fc12da332c3956671ca8e7d583f704aacd6dfbb6c60aa3352f75dc. 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/BR66N1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb738730cf7f508fb5cb5fb317f72a2fa61fc367bf0fe8282033326295d843dc1. 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/BR66N1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5440af5d0ea6f2538b3a216a8f6f8241dd2c917e075a7b52eb1410223a115f0f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/BR66N1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee404f4b40839208b68b87f7ec55bf26a214c4989f450dae8d1604218df2872. 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/BR66N1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6126f0168487a7c0740eee95f1d303b8f00380c67b4f9175ec0df76f9b25d273. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/BRDEP1300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7669e18778f44e0d6536b9eb67f0ba9684a9729d32f3377bb21765791d29c57d. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/BRDEP1300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0229e456d6c60e15e387ac8e0b6ed536a309c9a3b781f91bd93ee8e0c2d4367d. 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/BRDEP1300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0936550a1b0193e0639a781a742755e7d1c8d53b059a345451fd2d2b014622f4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRDEP1300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cf8f16aa7ef70e876ec565f69a14f60b716accc75e56f98c6e90cd5caf0c8c. 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/BRDEP1300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56988bf8e7c63ce73e0eb474672349ff245a2bbe5a1471d72e58e3be54faa6e7. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/BRDEP1300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd605d79e16e2d5646ec1b8a597099fcef8d68b5dd097637b9b901e06e3403ed8. 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/BRDEP1300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e741c08170aa2ff8343f28806fc748836574c4841e7e5601effcc0412b717ec. 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/BRDEP1300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a26d1d283e84f8f42968bc784be3b40edf1247de1d60022e3617241dc5658d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BR66N1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe358ba94d7a6cd97fe4e0345cc4635f12a59637baf9a3a527cbf82bea2fafbf1. 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/BR66N1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e9858eebd21733a1e69f021ee900713f001d13c4fce0f61aae0fc8881a7b0d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BR66N1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b89f58f09c8b5e708adba6a1965e244e8a13502607cfbf89ed5bef225e4d371. 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/BR66N1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f2be98673a29967307e22245945ca964299d89cd06e32bf52541f55c269183. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BR66N1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf971682f563e83ab5d87191123603d28d9f058dbafbb3e9a45e71dc5ca47b2d0. 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/BR66N1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873a0c9305c7e81e7b744c1cc28bc879712111c69c17a27428fe38532acfca0f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BR66N1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9dab604b754f5bde8743321b5409c07c65160ca6fa92c64294624036c23fae. 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/BR66N1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6cb41a0a3a04c75dc24e2a97de3103d6251e28a3dda1c11f8ad7e8754280d6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BR66N1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f932499ccc1d0ee8d5b749889184665123ce4658c6743b26d0ea347bf0a1976. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/BR66N1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba555c77dcc7a7964bc063ea13643553f002901ae245555a2121f223d9eb4cee. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/BR66N1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10523024292eda630a3b1f5fafc9c876309d5181a04869bd74208abf749e6d15. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BR66N1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd950a565660faa4d27aaa0dda064e12ccb07beac3d844867f39865e37914273d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BR66N1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65992a9cc1644db92f7b0906a134f7f0dc57ae42715e50704571a9dee8a981b. 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/BRZ9C2000527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c548baf565be8d7af4c0d8c339158735aea464580a7746ddf362f9f9f2e75. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BRZ9C2000528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c394a6431ba1f3297bd0ec209a50843855f13a5ca7553db6fc59db0909568. 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/BRZ9C2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f15f535c11d55426aae5564066e6878967bc299123871de136fe50eec9646d1. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/BX66N2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b7fc9dc9dafa115efbb0d28778b0f9eb87c8259d678ab7ab37fde74c026461. 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/BX66N2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c357f45cbef1618577554e284f1d5012bf608dd520299f739d53cb8235b3d92. 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/BRPUI1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfb022b75d01bffa2a73922d3ca83be23eebae9340b00b5be3fc4b7ed729183. 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/BRTRB1743614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c394a6431ba1f3297bd0ec209a50843855f13a5ca7553db6fc59db0909568. 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/BRZ9C2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11721a8b1dc15f304de1b55ff607fe4ff077f761a019d8622ca3306585f04d21. 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/BR66N1100001.