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 0x673e216ec23007624ee89612bec79c1a5d7bc8ea942b9780d1b92cfc05198536. 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/d59c6d2f-9eed-4568-9a59-c6d2e23c605d.json and https://artists.proofprofile.net/proofs/artist/d59c6d2f-9eed-4568-9a59-c6d2e23c605d.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 0xd417a0dfda4c3642ab5cb972f2c0334191effc4d61a6e08d49e42afe728b709c. 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/IDA652100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272a1d1c17290ecc244232db0c6d41ae617c988e04ace5936bd78899a0e257fe. 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/IDA652100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052fb752bbb662a267c82b0f2f228b0529ce197039b8974e3ddb89ea62742a9a. 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/IDA652200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba9132b0e809a7b855b73190f4a90631774b1d8d0cb3b4ef9bd24ff1cd90aac. 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/IDA652300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0f4c33973349ce443a003cd0dc90820f24f4417c86a85e5dcee6587bec681b. 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/IDA652300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6c33c49352251a0a185b98ce90b9fa899045b3d138c7fc7ce7898ae0a20dce. 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/IDA652300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4621e10a4d0d1f360617c2de0b6e22211824444d1ad077fef7ad9c2108b03aa2. 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/IDA652300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c6b2286410263a6cedcc04a263d86f028a4f41ac1b9ecf3a65a27d0e8bcf8e. 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/IDA652300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd308f7aa4357c06c8d62e6b598da2123c533d8efb23a13eb4d8c387f13c1d81b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IDA652300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf13f52d3fa3e16206e7e21c561aef2c6c69a230948c186e41f8506e46768a99. 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/IDA652300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c88c738a402093c5bdc539adf8828e399757c5ebecad4d7cd559986e6da4da6. 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/KRA252301657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052fb752bbb662a267c82b0f2f228b0529ce197039b8974e3ddb89ea62742a9a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/IDA652200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272a1d1c17290ecc244232db0c6d41ae617c988e04ace5936bd78899a0e257fe. 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/IDA652100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6388964fd67fd9bebb0a8b651dc544f6bec4cfcd98b54ec55e4f1e8af7b3bd6e. 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/IDA042061101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d27bac031a13fe507a0f5e6120ab409b9672eaad3c75370d91e1cb3602ece. 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/IDA041961101.