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 0xd6d70d1cb2fc24d2f479ca6523340158bd7790c421696373801d3c0b1ef58051. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b291835-19a3-4788-8be3-58aa254d8cdc.json and https://artists.proofprofile.net/proofs/artist/8b291835-19a3-4788-8be3-58aa254d8cdc.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 0xf08ffea4120283256ca4ed0b55569ee1a37846eacbfc4765925313caee5b33a8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:34:47Z), 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/QZK6G2084764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13787dbd7506e0f7fbf35887030f9893fa4ff162300176659143b753db2ef24e. 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/ITUM72101621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352b1196b6bf82b37b3d343ed62f15f50170ff17142b2943f49cd628e3fbc7ae. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITUM72200423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec14435e7ce5df83f246acc4629ba2b5cf8a6011a3f12248d644c3d2cbf9fc9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITUM72201142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba96bf88c01a85bbd7492971d892792c7a80610a23dc77ba926ddea6810784e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITUM72201779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccae0a95ccfa1aa918dd077513695e8405a9cfbe35a1fdbf3280e5eddb7ab88. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ITUM72300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14776ac912b2d412d83a2ee78484ab1176238c5262dd3c42b4d0d91c5e2cfe3b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITUM72401147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e78fa3ea26fcf7edd22a8b25c0409e06b09bafbe4b4c1d198e735a516811b7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITUM72401142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092a6662ce8d798a2a0138663f56333a641c4fe8d81c449c90ce8966d5f86318. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ITUM72401150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859dda318d0173ac304c57111f2316b8671c7aaf175fdb57426e7b55ee40150c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:31:19Z), 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/ITUM72401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b36d8c92e92987e25faadd7e8df451c400e187e38ea845ce259cad9bf778e56. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:45:34Z), 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/ITUM72401152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af37972f40d677255f43b83ab920e8e8de3c4967ad37c1f1fa2b0ba89f27b69. 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/ITDF62277092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c8f09301c8ab6285d2300c639a8faadc5a087fff75b50711595bcfc19239d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITUM72400463.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edbe31ec970dd3e209c2bb02e1cd9c56d9f5a637b660d4aefe9a5ec37a7036. 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/ITQ002200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edbe31ec970dd3e209c2bb02e1cd9c56d9f5a637b660d4aefe9a5ec37a7036. 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/ITQ002200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edbe31ec970dd3e209c2bb02e1cd9c56d9f5a637b660d4aefe9a5ec37a7036. 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/ITQ002200032.