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 0x88ac8c3309722bb706a33b15e3dfdb6b80e9b1ef2a91eb1a363b163f03ebe3b4. 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/5acc7ebe-ff9f-4fae-91ff-26c354703266.json and https://artists.proofprofile.net/proofs/artist/5acc7ebe-ff9f-4fae-91ff-26c354703266.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 0x0c45048b18d832618cdb87ec8d0003ad0940f0471856684fa4da92bcf05f4663. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKZGC2300976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553dc86bd3d2113fc272d1af8330bc9ba1a1fe8735001974594b15d7b83e953e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKZGC2300982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09779b6495aa9b30e12521775a043aad9122e5d9bf3c85da61a7ee904d187af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2408842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971fc27b2f8a5d525b1254b9c0fd98006d02c789a7c8455e5a28b8b0fdfee913. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKZGC2408831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc073d0941162e56eba358bef5dea2310d62860664a547523208634c025c6db2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKZGC2500882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef3985f6660eed9e852388fe3b9ca2a09722476f03b2c84a52fba89e4b5b0d. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/UKZGC2503799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f261fc4f27c2b813e40b3bc6d3fd4016274c5c4d113594e58e8084a114df04. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2566619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61edfbbf8e9adc42c02216a0f3a4d4c5c645dddb34d990c5ffbf25a0f15438e. 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/UKZGC2408505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1738fe175358f6faf4f64fac6139f6be4431611d51ea228cb77491314d480f58. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2407331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553dc86bd3d2113fc272d1af8330bc9ba1a1fe8735001974594b15d7b83e953e. 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/UKZGC2300982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a4d67dd664e85821680a711ee26c92adc05c4eea1fc10f8c7adca517e91223. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/UKZGC2304720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c45048b18d832618cdb87ec8d0003ad0940f0471856684fa4da92bcf05f4663. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/UKZGC2300976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1170cc577fba17723109c1cb198e76bb8016a47b8532ac2f4f448a5782501752. 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/QZN882231976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8afaa34909506f97abdd2f3d57bff0d6d9c5a3fb4f50a16b390e2a3fc184ca. 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/UKZGC2200800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e1111ed9f3e7733567d1a14f3dfe8c6a603d6336d513e722969be9681ec19b. 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/US3DF2425203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd627b1a433127e06db7c176a1cfc3f9b4e2b86c3e09ebe4e10db14c59bcccb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2277851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fe4f520a0633f540fced5680645291b24d3c53a05ad64aecb8dddc9ae02308. 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/UKZGC2404967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0379fca3fc35671c309956db061cdc43453d7e7740aa6966eb9290822ab765a0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKZGC2300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219d7e6823516e962fce15a102df121299f76686da8bd5a1f7c72dbdb0b04d58. 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/UKZGC2303852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61edfbbf8e9adc42c02216a0f3a4d4c5c645dddb34d990c5ffbf25a0f15438e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKZGC2408505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa941e6066ffc3af19eabdd35e2a478103190359971bc8c9c486d7ea528e389e5. 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/UKZGC2408339.