Christoff is both a given name and a surname. Notable people with the name include: Given name Christoff Bryan (born 1996), Jamaican high jumper Christoff De Bolle (born 1976), known by the mononym C
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 0xee5670d1d9503a4d1ae99515a5257f3660e97016bdb1776c74c85a7450ff8cf1. 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/3e372419-708c-4bfb-aec8-e73bc88143e7.json and https://artists.proofprofile.net/proofs/artist/3e372419-708c-4bfb-aec8-e73bc88143e7.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 0x01906f12778c87fb11b1a90893ec7037b5519a0b2c7525621c486fcacf7cf714. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BEZ559810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ffa74073283bc569578d5008031345e564fd0858a74e73aa029a4258ccb6fd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BEUM70800673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1983534ad2370fdc5fd3e83f8e855a9c443133bd3be6f38e5b62d7764ba99f7c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BED010601406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a515ed4884bdca3a022488c3e4e12b1d01b52e24f272b1feb483567eac5dda. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:09:19Z), 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/BED010701543.
't Is Weer Tijd Voor De Polonaise (Pluk De Dag)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb307b5c58513bd936b0f733e7e5b690ca54f9f2417aefe166196f784e3865a13. 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/BEUM71100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45a95b8b2caf894d0c098601ae25d7ca4fd89782bd36b6022b399dab7324f5f. 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/BEUM71100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387129f30df87db9726bbcc3e92ab6a5bc20a3c30a5b48deaaf1f7cb6b8deef8. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BEUM71100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2204ff89af24f8319c21fb1050bc62d9889288f21decd6bce852cdcb6148f7. 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/BEUM71100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbbfb76ee74d3917001efc57f9324cc8bb9f7fd6daf245a907ea07640246ffa. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/BEUM71100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422f8286494fef6506079056b3e48754678373a782da50258a2585724776e0cc. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:56Z), 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/DEA811201141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dea1ee986ceb1967d09394eb4e6cfe834787640868312b679d27043bed88a5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEUM71400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aed7b0802a622b825dfeae2b5f374571c738399ddd4b3b18c7196dec5a2601. 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/BEUM71400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a8c27b45d3969759bff777b1408d4997abfe289f543577dac9301ee050155a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BEUM71600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f3abc0f62f2d5cc5bcf1a72dfb26eda916ae0633d38530ae20f20add5a20eb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BEUM71600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa369ae144f4be97f5beaa81e4a95839f1fe542f5d70dedc77ce121e098162860. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BEUM71500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbbfb76ee74d3917001efc57f9324cc8bb9f7fd6daf245a907ea07640246ffa. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BEUM71100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96f9df0d5953d09d75c7e5caebe18856ed17a10f466f5ca179f9a6beae557fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEUM70800390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedb292841d3ce6204469df62399d7e4492195b7b4d5556c477ebaa87d1d55a3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BEUM71300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f078d3f8e59ad761b31e352959d72aa3752d030b23a30f42d8db6980b9e1a51. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/BEUM71300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe643f1ebf7631750e3d7d88066d00d2ed3e6b6cb988da64238f3222912d8b773. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:50:37Z), 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/NLZ292000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1f5a5042ef0ea862252ab44ec79967e5950f65640971f39802e659764850d4. 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/NLZ292200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab50e1627976e0ed26403542ae0c2b8a2fab29e6a39d74c3eb9125499a832503. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BE9HW2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe643f1ebf7631750e3d7d88066d00d2ed3e6b6cb988da64238f3222912d8b773. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NLZ292000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb743e94b5e52253024bfc59d7d99fb186a3485fbeaf015e9268d219af8cab933. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BE9HW2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa977bc38833e390af2e5036e2b98154adb9f54e565a4740f4407dfdea3534f43. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/BE9HW2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1f5a5042ef0ea862252ab44ec79967e5950f65640971f39802e659764850d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLZ292200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5398fdb1f02c2a4528c4c85c088f41cfbfc546cf544e098a90b7cfc3c1e217c7. 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/AUXN22060055.
Een Dag Om Nooit Te Vergeten (Originele Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf463dc27a340b97555d9345fd680e7aefe7fd412bdafed57988cc2547dbf419. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLK072200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08416406c67173ccf56a3da931f5e23318a672879aae4388e60946d59ecb7f8b. 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/NLK072200092.
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