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 0xe3c8f85563a392544dc651d4707678ed059625420e1b782c14b314a9c09eac37. 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/597c8e9e-f199-4290-92e9-13e868b3df1d.json and https://artists.proofprofile.net/proofs/artist/597c8e9e-f199-4290-92e9-13e868b3df1d.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 0x5c4fd56948d882b605214374bdbcb369b884cd1dc8876237e192f213b4fb3277. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH2011920185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314f7b0d88df08650cdd1bdc4445a9163881536c51fef781c66913f6c88ac421. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CH2011920196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc88f27b5af19f9b4bf651cdb66a06482ca471dd9f52b157dfedc410783019f3. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/CH2011920180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9e52b87df42810d2a49f777f1d086d1882a93a620576da3cb7d2aa09b16246. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH2011920184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063b34ec0e7155fdaf9df13da24a8395b65e82a53d1853af80a77da39deb658. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CH2011920197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef044581a7a0334509faacc246486ca06cfe84d534c9ec28afa668a9f772ba. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH2011920183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3aebf3a3eba535739efca8f1d42c685c5a59cf4314147180e3a1d0804233c2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CH2011920187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbe4b970c320759332496c1d7232fdfea87a9e4c26c2620ec1caca61dd79d1e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH2011920191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d8df45ff6ee4ead3204cf2dcea4dd0fc5e28f151cfe25a138019c90fe0025. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH2011920199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfde7f25afe1cc0c42933abf469ca9787b569deb4754d8cf2e44dbccbd1a1a3. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:07:18Z), 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/CH2012421560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c0ddac9c9ccd57e9c02fd2260277059e26ff37e129e30472eb32eb8efd0a4. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/CH2012421562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4547ee2c4e0f89f3f6dcd735fcb32875212bef82a652e4082766a28d4561c1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CH2012421563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0955d91cba1f013a2b738be3d8d2142de617f75ff6e5c67e9d0f2e402840a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CH2012421565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4e8d5f2e7be883548f6fa9ef25ba903975e8544e7ad7f453be0e22b076cb88. 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/CH2012421567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6832479e6232d26cbac480c6e3fa6d3fdfb2852e6ffa9aff47bb2ff048fdbc. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CH2012421568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bce9686a4a5abe5f055194284161dbca14aae2018b6268cb8fb6c3c9962b45. 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/CHA171800165.