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 0x1e3dccb4dfe3f6eddf853c159a552bd8d6cac0c2dac414dd87be340d650ff571. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a4bb6b3-2cc3-4017-b239-0391a1d788d6.json and https://artists.proofprofile.net/proofs/artist/0a4bb6b3-2cc3-4017-b239-0391a1d788d6.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 0xa5d77f8848dad538b25d6f9ad0c3fadcaeb27a8951bf60bb87f7b83582f3855d. 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/GBSWL2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dff931d122ffe7a1c11bced7ba1e733d2656034323ebbacab9a0508aac4f0dc. 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/GBSWL2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9b198311d4214b64ce19ed1d3592c8e2f9dbf02d5318d514c616204470ee60. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBSWL2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5584e144a3a9fdf4dff8f337a34ff2827654ce7a239d1736cff4ee1f27b104. 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/GBSWL2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89361e123db0f0dacc8cff09e23286300bebf00ea86bfb1cfc80b0dca7843f3f. 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/GBSWL2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6220f1baccb9025f0c83a38ab57ec3fb6ab0c795136e2943ea28ef6564658022. 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/GBSWL2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd555a94d737f279979f234c3006587f75ca13a54951a8ff63e8e19e11c7ccb6. 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/GBSWL2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c68f0472b126082256114619b410ace957cd134c35a50dd7f3ca40d7b671eaf. 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/GBSWL2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e089d6db8af5d82049f2b93e8a7638743b20fe43b622ce505d07c605cf9de4. 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/GBSWL2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f5953088c6557dc860752b1e6b4e849cd6b117abbbc0972f9ad809db34ce8b. 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/GBSWL2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a063f7b68d96d51c812e9793f4ede6e0fdea8309f22a2dd6bd5b21389f62b. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBSWL2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d7eed7b5580d58571a76a816f2f4ae3eeee3e487956c330127e084a07a5df. 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/GBSWL2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84f3a5318a17c1ba1466cdd4f46fa4638a7599f3b46fc8932f1bb0ee067633. 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/GBSWL2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14b1a57962155bf2c56233f589e1cb9f1ec42ba47dc5a3a1e77b18e7366b18b. 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/GBSWL2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e5023de8c82d3fbcdd891b221af57dce240db16fa4180e24fa76dc0f5719a6. 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/GBSWL2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb267d4021a0114638d38215a7cce543c3cf2d2a2c00c32f9e6805cfa54210e2c. 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/GBKQU1918483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d77f8848dad538b25d6f9ad0c3fadcaeb27a8951bf60bb87f7b83582f3855d. 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/GBSWL2300019.