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 0xe8cde4e0574cb5fb3fef7af0088b06846446dd3756aabb1ac9fa19d3742afef2. 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/8f18eb3e-0449-4b2e-a57f-9b21daae69a0.json and https://artists.proofprofile.net/proofs/artist/8f18eb3e-0449-4b2e-a57f-9b21daae69a0.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 0xa51f0f26388e43f563a3ed1254f51df6bbc59810411e7231d5960ceedcc68457. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USANG2210097.
Classic Nursery Rhymes On Solo Piano Vol 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad58c13b1db0d489d17061f2e68c837c8ad0b0aea5387f56aa5954c02713bf1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USQTM2201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8887023bc900a49058cdb7b5fbe662f75c64ff57caac59f4dd4f446c7f817d58. 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/USQTM2201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dd32d9fdc91b76d70fbbed7871fae2638eb2c36b93894fabf06e82cba8295a. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/USQTM2201011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02861a4b3c36563430ddc6610d581004b113cd7d57b135cce91da85497d43f0. 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/USANG2258751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6620e4fc8bb65bb07e55969062a4efc02cf8f2f0a311ece30f02010f3662383. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USANG2258752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa69be860b3958911349ed586ce81740dcd5fd5798f6aeebcd784fa95a3acfe5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USANG2258756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44096d59762c5dbe116e80ad9cd6b988514c5ace2c48438c9133ca7e17bc31a2. 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/USANG2258759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4adc2667f6df31c5c43615fcf2dac448b7e7f58eddb0e4cfc57c6bb7c399f7. 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/USANG2258760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7bdd6e0f5ab14eda7d42759c3384cdcc312903043ade579451cce8dec4068. 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/USANG2258765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507bfe442a744b05e32848f740a889a4fedf59acdf87a97d06952f5d52c44879. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USANG2272150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e3e697b62f237118c20b2f6399eadae459bd6bba704edeb6ff245f5625764. 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/USANG2272151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3605aa77ffae227f977d8ee5219e7f3e4dfb02f3340334ba14f04a5152449c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USANG2272152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea3ca38c51d62d163049b8c24c6e40bbc89c16b08e430d96aed9e6124a51866. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USANG2272154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c242e25968dfcce40c1624da7b26f9e90f9dc7c9b2f859a0cf387edd532116. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USANG2272155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b39333f251166aea91f719e891feeca0ce01d2f97a54ff2c168ce272530f47e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USANG2272156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9830bf55bacf281f4807da884c054ea77d809d22d467c92c6a9aa23f9b6e005. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USANG2272157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeb2b99ede5bab7ee37ac73917580bd6d8741174c3e616f63fabee5909ff307. 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/USANG2272158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3458665a81271a69047fdec2228a0e1421977ee2fc2e86568e2f83504b8588a8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USANG2272162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa7b6459fc2b28a41cd3c59d32d4148b4546c844477ddb47bd7288891e2077. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM3DF2202046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e83bdcfc236ac78acceddf953ee93a0e0b9d80a1860ed5daf2820a83903ec. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM3DF2206595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b1040102173b92bebe51dc8e3a14387e7eb9fdd72c61e9f395a8f40d4a67e8. 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/QM3DF2206596.
Radio Favorite Lullabies May 2023 (Lullaby Covers Of The Best Songs Of May)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12226e4bfd8bf4f6a3c18fb55439fb33a0af0806822471273c5d6d4cc91673ae. 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/QM3DF2216993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085840795ddef4b49062775bf7de0e855ddd2533189a3e7dbdee8f8955116c06. 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/QM3DF2216994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ccdab58dd1c65da8bbc5441e6113ab56e9f9b6f5c42da8f94c374b3b527886. 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/QM3DF2213269.
I'd Really Love To See You Tonight (Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874808621a2ed7c398f44fd29735fce732e115426e01639c2cb25909d3d59eaf. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM3DF2224565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84923ff728dc751d56b331fc66ddee37ec2e7b3a3c8e896cf9efded001be444. 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/QM3DF2224567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed367cd1f4968177a010ec5862f279e7de170d98303637b3806be4d6bc7bfa5. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM3DF2224573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d10e2cd4db50dcb7749dadedadcb732abab50e6461aaaad65b2e700b68a211. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMANG2215385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fab5cc93f2d7d21e6c5b62ff1ebfb36ecac89f77f3ab547c07b0126d7a29d80. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMANG2215386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d4db248a6b58dc1a78f4ebf5c81f9a3c0c0dd3c555dc801003472bee31201e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QMANG2215387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfafccc53d81a01a546dd28165164aec26f2260495a73b3dd0401b28699a234b. 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/QM3DF2403645.