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 0xbaedf05cbe7e4779fd2d1abf5bfd8bc23d4dbde3ec49b75ef412bd02233f62a0. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2145a90c-6c00-4f63-8f74-5f2e58af99ec.json and https://artists.proofprofile.net/proofs/artist/2145a90c-6c00-4f63-8f74-5f2e58af99ec.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 0x75b6ccc8cd27f53694882bd3cde7c9a420fa5fc4d694b99dc1d71e13191a3861. 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/FR9W11615417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623dd82caca4af262f4df0b5d8e5ba1ca678bee65bf66c9333ed88188d1d6def. 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/FR9W11615418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2e1d783cb2a9cda90915aeed2e8f45f7eb1728f4b829a81a9b8156fde4747a. 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/FR9W11615419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5934e20208dfa7f49ae67d318e59658de753712a103bf76c7b2461d1a4e0ca. 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/FR9W11615420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5959644fb3270a71d3e45ff5795396ddd1c4cbcd79e4ab4c797504de6bc237. 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/FR9W11615421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53648dd4174668f63fc7c288205592663bdd92ea6ccf05597a5240a2b9af462. 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/FR9W11615424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c2265eb7aaa60ee70e75aa246b19781926ec6042ae9d8b095b1a78d8dbfa3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR9W11615427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60575476dc4ce9059a9a94f0a4c5ae0c28a4dce146b5c27fe7f59ad274c80d34. 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/FR9W11615422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fbbe07551cfb67bc7e5469fb8a8e49ba2838ca120c29ca13f6557f7b4544ee. 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/FR9W11615429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe25e65972d72dace3f8d3cb411da56952972d32bafc9ad0cd0da5393fb00eef. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR9W11615426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a8731afdd00a1529aff38d7008406a1dd9c3233e2912b0b50048a55733df5c. 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/FR9W11615423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599a285160ba6145a7d7d6b7020e11bfe52472cbf3a2065569fb67f6a0c81398. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W11615425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063b2aac8655405197aac66edead7855d4984c6709fd537ee7d528d0fa3ca4d0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR9W11615428.
Boogie Slice, Vol. 1: 9 Slices of Nu Boogie & Modern Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd5827ce3154b3fb11a9c8fa22672b8fe906a8fc0ae7fbcda19a8a2c03064ec. 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/FR0ML2100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f291434ed8a442c9317f6810a57449658e9b39d77c776525301fd9ae184db4f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR0ML2100510.