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 0x1a494160b78213b22f932f18fd6b45e956262c898d16004d47fe941b1a23db23. 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/3e815470-ace4-46f8-b00d-174da51e9bb8.json and https://artists.proofprofile.net/proofs/artist/3e815470-ace4-46f8-b00d-174da51e9bb8.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 0x466da19460541dfddc8dddf1908703d8d5e02c1908db4a89faa51b9c2cc22cfa. 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/NLV4K1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b88318a8055c1bccac382f9561caf2f5290c8853c4413606bc7e72fa8342f. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/NLV4K1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4dc3d6f68f3c9dac5a15adb56525e7ada044c1cba09b13ed11125eeb18bfbb. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/NLV4K1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a685d28c514e3c1c2de3504665c3b73676fa3eccfbab161e06ca54c3c2ab1fc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLV4K1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13824a502277208663af14a13a25f502e5682677329b7093739796ad7adff232. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/NLV4K2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b8027bd9a7e7813b7df1c4aec937bba90f15997795f3c1a6476074829020e2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:45Z), 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/NLV4K2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd790298f552ae40e0beb6736a663937bd5c3e4c4b38fc351c7f0c0551d715e5d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:51:52Z), 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/NLV4K2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6461540619256d45ae414706e417e5391f81b7dac0f566dbd22d756201ea4dd3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NLV4K2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d16eb73f35eb43e0e1a8c894c4a23605991598e392c0dd3cd2d298dac0c245. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NLV4K2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079b0ee70dd2dfd37b8a2c25c4565ecb70dd9956cc4f4493f84134a9eb0e0d84. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:08Z), 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/NLV4K2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc852dbc4d085a4389a073f1706f0d43d3e9f94520ccb0314b73c88d5c1ef5f8. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/UK5EV2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf320b37490ce0d5c99b99bbf1d2ccee3f929f18658e7776c9b8618b797d4df79. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLV4K2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc23fc511486d7c0ea2a31657aa00815bb0aefb2008a2f2fc73cd082230fa0ca. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:41:26Z), 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/NLV4K2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250cee8b93ce8c12f719c627b846f08ddf6e68da82a6403da928f8d67a440c8d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NLV4K2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5630bbca693df36425cc4a26de9546f85a06b98cc27dcd69a88f7add23653c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLV4K2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8031c423c03d33a2734ee68d4714bc22788ac09e9d5311992a51c51ffc5002d3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:26Z), 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/NLV4K2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b2462bf94b40e3d5a7608001015b56e78248b80cadb9bf400515c8cee77dd5. 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/NLV4K2300007.