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 0x4efcec6170916cbeee5f1156bec5d3cf3d6a0aa0037f2512a0b5c93960d12105. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/500a59b3-1e7d-4d21-a29b-71b0bee56a00.json and https://artists.proofprofile.net/proofs/artist/500a59b3-1e7d-4d21-a29b-71b0bee56a00.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 0x829ac7fc00726df34f7499c15ed66ec6f8f1bc1488b23c0d48ad2fe93c315285. 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/GX8KD2404807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a9fdb768f5f3c4dfe939e88802346a7a88acd02bf2b96b35b09b880ddf495. 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/GX8KD2454225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1077c4b0d634b8cab1e4f22585061a8569acb3054c3743c3a74ff4cad7c35d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX8KD2468220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac33a364e5f3da9bd563f6df14ca09bcd8ea760d40d4c2de2cf5c91b6eb6aa6. 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/GX8KD2412682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61f3a32dd2e969400283519257579edce1e9d4872478cc6a199d022290a349. 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/GX8KD2487348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae0d1ca635cb88b915f191af28f46d26e3a201c5a9936379bc2bf1ae0ef21f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8KD2464129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef39354b7a00b130e5de0b5cab53f97a4bdc1c5c417455ef715680fcaae8345. 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/GX8KD2450517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c9f7afc7d6cd068c5a522259d117e4a9c9d1f4703e6f36f73a5f658683f450. 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/GX8KD2451770.
In Your Memory (Bass Citole & Gemshorn Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb389ba560e00fe863d05c7d1173c16669dd8c513219352a794180bd0de7bf7b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8KD2483658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed15c1111ccaa7a8d46a373eacb8f70bf510669f7c4eb2956114a846479325a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8KD2452683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609e9788a51b579cd6299742729c3a2598aa8bd1db6c767093bb024f6592ddbd. 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/GX8KD2440165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061ff81673a1447a8a1afceaeb79c1022e96cdbd2d48cf6feeb78688f7e7c8f1. 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/GX8KD2446848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba814f768c68b4a80f8642fe91a574f72d20515c2b799def6ec55532fa22a98f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GX8KD2446218.
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 0xb1e76e0693d54ecb3f797d38129465e2208e97f0507e4c091b662d1ca37e2b75. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GX8KD2430613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb6f7eea527f9df76e3c1f8e2a564315a96b4475b01663c8be3bcbfa01aadf8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GX8KD2429173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4a5bdb8e0062cbe18e8efe8ae6d025758d0129be316de748f92698da1207c4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GX8KD2403279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8c6eb5b970de55d65fd948334d5f3736110994e4a8ef77de98542686202a4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GX8KD2446394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fce6947fa9274460d3e057557f8cad10fafbdeee8272f285a26de2f15865bb. 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/GX8KD2407290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6502eb0717cf7f2d98c7eb7e233246e2d06018db758eef023e10bb2ede40b4. 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/GX8KD2451446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8070b835c09e9be7cbc5d528726e7643326ab5ca14ea4742bbcd2c14ab37d6e8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GX8KD2428999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5b20b7442cdce1622cb26ed86285e82dc67cff760fc46b77826e87cce522cf. 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/GX8KD2454244.