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 0x371ae1a63c615b6563e6b9ec905662deb8cdf391c2c771e97cd00cc77620328d. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a0fd258-7f90-4701-bf0b-9f3c42a461e4.json and https://artists.proofprofile.net/proofs/artist/3a0fd258-7f90-4701-bf0b-9f3c42a461e4.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 0xfa0426d23c48a24a9c4aab9452e58b6e261ed6696fc10815a6f787117e996d5a. 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/NOCVC2275010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3c4801806a98f0e208507efdec836d7f2dfbf76880847bba1b3447062576f6. 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/NOCVC2275030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe9de8b64806f106d043da4eac3a29520a64b0100a111b85648bd08019ee425. 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/NOCVC2275060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdf292418b07ccda62356531848d1788e7c79631242c120a670e9e063748af0. 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/NOCVC2275080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619378505210e770db4fe463abae309dfc86d639231d5f151a0fde8e282d9c12. 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/NOCVC2275020.
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 0x4b05e19043a4c8feb737152d1b926c6ba58329aee77164c314d52ee99ca3d064. 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/NOCVC2275040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1f607567b99fa605252b8d9f5f1a07f751679b3d096f1d3f6d01f08ed67088. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NOCVC2275050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e390d320979a7f78aa6babfc5cc83db3b31cefde3a715b8032937b201f3f632. 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/NOCVC2275070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27dc582a57dce76bc85b3b7cbe259428036eecb89833a03d5297f2082059483. 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/NODAZ0505020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91255c302dcd5a68edacc5e500c461d8890b7cf95693c7af6f50f6e2fc1907f2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NODAZ0505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7a3d93cf92a3fe0f85c5bc44d85622a305acdec63225b83b9260b071cb624. 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/NODAZ0505040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534ec3ce0396042b9704c5734ec3d705c1d10e951dc8423b88bff714394833f7. 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/NODAZ0505060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcda432f1c65db7a2e6f84f0c4741982b92894e3eadd5f3fd1da0238297901b. 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/NODAZ0505030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e9b803b5f8c3f2cdc6e0d0c1518a9704f72d027cc44754c7f79ae38b251ac1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NODAZ0505050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a30ea064e11d551cd9d7c9d6036ee622c23f5797b4a58b11c84a5da96cfe42d. 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/NODAZ0505070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272e5985f81c1096186ec81ee081a87c68edba0df0aa91408650cade49b6bd65. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NODAZ0505080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ffd60e9d76242cbdf125775c334a9a79e43b311d5a60bc736c8ff8a8fd7fb9. 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/NODAZ0505090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391b1d696c725e67a648c9265341d9e99de0f677ad8075cce91798393d2a08a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SELAA0300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aaf3f07f0eaf4c77ef13304f35a5497614e56245a9b88d45ca9160e026562b. 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/SELAA0300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b59b6396d9ab2ba2b5e57290ffe76d20affdedccf6c03961d4c0f13ecd9e5ab. 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/SELAA0300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54265f83aa889587d0cd52d2b5da19048521f6838ccfb8ab2b4fcdc52121dc2f. 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/SELAA0300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e672faa08869c83c327d52d7107841f75903ab511fc4bb72c4a0abeac06f343. 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/SELAA0300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9ef5384ae10c96fea0e258152bf6a0f90dc51b13bb014e044806009fc69576. 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/SELAA0300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d91710772037a7ac89eb4359f8e6ff46d7bcd451ee0bd80d9979314187c68fc. 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/SELAA0300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc71ff6e05e2f2f38668aa41cf4a6179801b4381874086b3b472a437257eac9. 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/SELAA0300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38198341d8f071d108b183654c1f4ed40cb2d92c98594eea4cccb7853d4ab694. 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/SELAA0300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47b24c0771f3ae59b48dbf88c53cb969addcc1393e80b5e8e44f7ff703c9999. 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/SELAA0300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879cee25e4697d7210dd6ecec35a5d302b3c43b10ff4ee0947a30f6a1484217b. 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/SELAA0000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7a0dd12279b0f3df010fdf53c1fc70a72255e101952c947cafca9bbd8f3a7d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SELAA0000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76715932c0650a4e3f02da0fd1a22de62c223585c8f1de2295159b0f9034d848. 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/SELAA0000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a2b82fb24a705cfaa298f0b68ad56c8d649b6dbbd92d6f357d949d2a41140d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:37:47Z), 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/SELAA0000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7024b15244c642d39730e85b3739424b0f833b9a479f1e8cb5a35dc1f0790e4e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SELAA0000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76978fdf50e086d560b873b22612bce856329e4ca7665942e7cf5f422f6596d9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SELAA0000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ccfc20623774e2240621946a413c713b8dfa7d448b5274bee328819d21b01. 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/SELAA0000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7298474680e2994a99cb4a0071300200dcd936049a56d903e8894d6b60aa2c6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SELAA0000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5229f7924bf0ebb2558316b3724c30ddd4bd1071eb63d0856892e7306bc13067. 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/NOCVC2075010.
Det Beste Til Meg Og Mine Venner - En Hyllest Til Joachim Nielsen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1f0fe9a2703d05dc4b394a85d5744ff1d8f664379cb8cef866257209e59e6d. 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/NOBEC0501280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d97540892d20cf561c5ce1d18ba3a371e917dd6fe8a30b012b5ca6d300b2480. 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/GBAAQ9610502.