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 0x0d735d8767c3dcc95c70f99dd8eb4b15af9ab03e2f90f03f2731429924a2a346. 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/63176edd-d8cb-4521-9e15-a92635039735.json and https://artists.proofprofile.net/proofs/artist/63176edd-d8cb-4521-9e15-a92635039735.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
If You're Happy and You Know It, Sing With Me! Circle Time Songs With Nancy G! (feat. Doug Hammer)
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 0x42990bb03d73390f639c2bb295edbf0f06f95747cf315ed6e9a3e085fe227d15. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM81582408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dbd730bef744e6cc26e8505f0812347730a4b35b607f86b197c0081c7674ea. 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/USHM81582409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5db400b715affb50fa9d3a4d5884a2dc94668f5e6f87f8c6ab93ebf83b3364. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM81582410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc268e98df59ba9f79b5bb1652a7c772f9bfc90aca505ba1b1e111e9f6919a126. 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/USHM81582411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b4491308b55be16bb1d4b278a85aabf5b3d82edbb55ec34ceee60db16eff83. 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/USHM81582412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f13fa554463a9d98dd2351b2eba4f6aa182994d05a7a26e28f2b851c88f1f16. 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/USHM81582413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff36307c9f2c6af54e4be19da4d3dec763c10009138a3db9a12093fd15ca546a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM81582414.
Hurry Hurry Drive the Fire Truck (Vocal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be570f365e538f2be50dc50c5f9694fe1fb089e64ae2a9559571ae417ab33d4. 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/USHM81582415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb3ec09ca1bea0bf21a81d9a2e5419641e774b5836e91e5090ceaedff5020ae. 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/USHM81582416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e84c2a3ec48abf80fd88ba34ea74f13e964c6442a5987d55c6d94cdff91c2e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USHM81582417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb977c83f4ca102a3dd151695a1f9260aebe753eb3692c5e51fefdc570b60cb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM81582418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd397909f09bfec6d328f0bb4d36bd2d3763291f3867a0fd41fa83da4ea97a28f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM81582419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d9214656fe6af6d714e084ebf3c26c670eab7124e43e08f6a901d48f643b89. 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/USHM81582420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e224335ac8f14c2c0ac93ae2bc7a24f874d565cf1217f920b8b082bf79684a7. 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/USHM81582421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc326f770ced5b94eca78689ad3302add23c3ff6b3a4ff8e115110f920c9bd902. 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/USHM81582422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2769d48274f5c938601205dbf78c97f43e5cfb7f9b573a220b69fb52a65cc4. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM81582423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d7b56e187b4a654d380b77ffe4ebfbf16f9c631bd2bd88f38f7169e18e7c0d. 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/USHM81582425.
If You're Happy and You Know It (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c9bc074dc4b053885b735f6e0970b717c6664f0e62522cff1317a1eb1c3c2. 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/USHM81582426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2514acc5210bb6f1f3d19ed53e2c100d100f34a8ab18fa18a112aaef76df481. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHM81582427.
Head, Shoulders, Knees and Toes (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440d3830690c8860223c32dbc6c77b0d6d4b41b305e1d2ebf2c9163c4d40fe5e. 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/USHM81582428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353b4cbf5c2621642e692857e02cf1484366569614ee428cc4f11a9f769a9936. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM81582429.
Twinkle, Twinkle Little Star (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e8f024672cce5e3276af45dbd91f04ec5de47912840470110dfb444b050fcb. 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/USHM81582431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba673ae5959821d64e5410e74a566c4acea6f8bb2739792a72d9a4ffad0cd5. 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/USHM81582433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5529f36f834ac0a6103fbeffa6590c30c2fab0b9ff9faa564351790ebe6d398f. 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/USHM81582436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7549b372fc6221d37a75bbed58191c111c5994417796272e9a8745cd1e837d3. 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/USHM81582438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3dce4a9adabd589d121bc66b2419320557a13013b6e333ce80e526557db68b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USHM81582439.