A telethon (a portmanteau of "television" and "marathon") is a televised fundraising event that lasts many hours or days, the purpose of which is to raise money for a charitable, political or other ca
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 0x72d76813650f563b9525ca47eb5f0beea3187504a79ecce3d73e669c560f7039. 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/b1ef94e5-d6d3-443a-9926-f0f304163300.json and https://artists.proofprofile.net/proofs/artist/b1ef94e5-d6d3-443a-9926-f0f304163300.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 0x5188e96b08bd9bf2b698a39a875a15acba99f60c18c80598776deae0703c6a17. 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/USF283089001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5ec205792f2bb4c85bae2f6c97ce640f579a3531571859046347fc7a69e3ee. 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/USF283092001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5188e96b08bd9bf2b698a39a875a15acba99f60c18c80598776deae0703c6a17. 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/USF283089001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008467a5fdba8829e760501cfdcec7c42e800de30dae140e655bd989cd402665. 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/USF283092002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb694706bb57595f850668c8d66064aa6c99a572cb3476b0b1e5a0413705b4e9b. 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/USF283092003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47229761e0c7f82ecbe69fa431a44915abad83e3f71880c4ce018be303685873. 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/USF283092004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1fce1ea5768b25fa09c427a72cb8cf8c01d1445e94892f2ea9e3a268a4584. 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/USF283092005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a087a714c09e862b625f8711d162f0f56056f949eb954c9a7299afcf54c630b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USF283092006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340463537cb4a6381ca745c24997318074c9763fcbbcf9afefeeb49eb35f78ab. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USF283092007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3691b5b7bc538674aa25a7dc221139d5281901d9c7e2f7bf4eea42bd99afa0. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USF283092008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37c0d731a82a21e0dd89d2df5aad4e69ecf09a2c282fd8d5d893ca6a4e9238f. 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/USF283092009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44028675841ce40a800a121d02f178215e7a591c2dc608dd095e402039bcb3f8. 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/USF283092010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c381d0159b84823f3b0f6d36152118da4609ff7179e89d4c939e0eda5735e39. 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/USF283092011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b16127e782e65be0815cbde83862ebfaf359bc5a401661b0271de0572a0f4dc. 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/USF283092012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43935b9246efafb93f8719aa94b48b4dc8efd08dcdcedc9afc5d0504704814e1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USF283092013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6894ba7164e526ceb2b2bb7228ed162caa0bdce1cd70d9a1883590c650a541a6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USF283092014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a59f1b5210eaa16360cbabdb22c5fc391226c89a664d74ee397699ed7af05e. 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/USF283092015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bab587921303c4a4d0b640b3d534b929fe3204ecfaaf3de5211fbe123d716f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM81775343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c200e0b2c4bec846877dda05b51584b7ee44b890641b2d297b6d401639d64fb. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USHM81775344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a89ca94b4c64aff479ed3223dfedfefbe16da89ade44f7151c6457e7319ad. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM81775345.