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 0xc06731865e639360c7cdf3756e3515c8505a2745c9551ec92e4bbec59ddd4e03. 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/74c49fc8-723b-41a1-b0bd-f223d7abc399.json and https://artists.proofprofile.net/proofs/artist/74c49fc8-723b-41a1-b0bd-f223d7abc399.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 0xbbaf8c6d597e12d5890aa888090da388b490fc48a037c296b5cf8c786df00391. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/SEYJB2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c17691d712f59960c4b6bbaf9d85a3f4c61a41f1d94fc140a4d778d27df84e5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEYJB1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d95c6ae72a9d7dbf4f6736e522772f70059d766d38586224642f0b37bea72ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEYJB1900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc56f629f0b1440a368ff1e07f4f8233938684ebd85eb0bbf4572f9878675db3. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SEYJB1900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35821260d846e8f2d200cff80f79e8b3fd92ea997c4eabfbcb1e9e4cb07524fc. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/SEYJB2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50f37e3968dbd626596d17426d260123638246360f13b5d5861f342bf91efa6. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/SEYJB2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1afcea337499e17a1eae1b0c47eec986b2a2e56934671de0b0d7cadf7180ac0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SEYJB2100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c7b697ae643829f49e30c16c553322a2dae0747118b652d4d79db7d560199b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SEYJB2100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c63f9269aafcf1199dd634db21e6ced4b96a8241178cfc96f2786b4921ad73. 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/SEYJB2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a27443c22fa9b7c001e906da044e20685b89ebc22974d92097378ba2dc2f4b8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:02:36Z), 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/SEYJB2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb508fd28fcd9791d1f8f429ce8118ef3f70c8c805c2401549b6e0fdb98dd7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:03:47Z), 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/SEYJB2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb508fd28fcd9791d1f8f429ce8118ef3f70c8c805c2401549b6e0fdb98dd7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/SEYJB2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bebc595df648957c32913944c096643ec0309650d784fc6cb2e099a6efb0a17. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:43Z), 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/SEYJB2500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c63f9269aafcf1199dd634db21e6ced4b96a8241178cfc96f2786b4921ad73. 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/SEYJB2300103.