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 0xc6c7b1f6b429bf03ff055c8615feaaf412209ccdd0405adba81735d1e2f350bc. 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/a0a7181b-9dbf-40fd-8911-82905faa496e.json and https://artists.proofprofile.net/proofs/artist/a0a7181b-9dbf-40fd-8911-82905faa496e.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 0x9e0f60f056315d103d11b71e130cd089d3ed0be47e43c0498def49a5d8e1723c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282408871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe72af1e9897d0783d66d6378a39c2906271ec26a8c1d2abcd377bb211a80d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0M2370245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54f1d7b7539a5094a61ecd40af958eb6903128be40d223aee0475d11a805a37. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA052402017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ddbdc3282ce12da3f3a1a9ea5163b2c0d677f67de07d29296325c6f7d97a17. 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/DGA0R2312857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e86589fe7a7f237bc48418d23e02180569d90088f2bb7948fae05ede6d5d7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0H2350169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c99548b2488e1ae3a695447f7c2ab7cfece0fc9df16ce7745c9621c4012c5. 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/DGA092354357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a914b9c406353b586a0406a5899885c7150a34d3d659cd71ce4b94055c5837. 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/DGA092349769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d409444bf53eccd23c3e56cb260062a22450b3d295af5e9540ca975fbf50c95. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA072367926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdee3bda33b9b644a9240e1315da3d09073940a53f10b885ac2d5fadbbce412a. 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/FRX282327121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a42a97266705d426066edf97668c90e5015b2e1604f9b6324a5f842d5d3a66. 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/FR59R2325544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa308c37c3ff57dd6490e1257dd1a65984ed2d9e12ae0274e7582f5c06a95b3de. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42380990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5856dda1b31f70a10c92a0e7865a4aeee052127b9be49567afe3ae445daf5f. 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/FR10S2380758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1458feda98823194e5d8f9d994fc311b982b17fc164d210856997418326261. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA082264523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b53ed419ac2057b44d9f28932ab0032019453d4fd5da489f2bcadae01f80ad4. 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/DGA062240099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275d590dcb21b3cea2ab8f389769d798367dd698c93f53a3472ddab6892806d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA062241637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48683d4a81c22f80f2ea15425bc7ed4bdc1d5bf965605d547dd8724790ce473. 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/DGA062234144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb8e2712fbc41af886fe3c24930d29e6de37fc07f15bae4d20111f09037b26a. 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/DGA062240098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63b077fa53911fbd59edd5df2d50edcc483a769d345a04e7bfaeea2111bc808. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062248945.