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 0xd5d01efbdf6e2d983f5873ceba8e4422b6dd3f279e23b353f17a2c792459272c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa6f125d-67a2-4b86-a52d-770dc0afc18f.json and https://artists.proofprofile.net/proofs/artist/fa6f125d-67a2-4b86-a52d-770dc0afc18f.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 0xeca3dfdcf730b945d110601fbb16cbd3854c20cfb9ce4fda5047929edb69458c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:51Z), 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/GBRKQ2231197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c33832f2e52b5db4a169c70ea37013a29b2f4373b12b35b21a9c7bbc859746. 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/GBRKQ2259579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfbf64e800d904d17ab7b070223d723482a0356db22cf6e8240dcef35dc25f4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:29Z), 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/QZVEM2324769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c104ce98d84bc9bec811a6d2ed1c128518e933b40f7626d312047f2a8e2195. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB92306857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6feda7ebbb2e1f501095250925a53ac21b2cb8db4ba5a328dde9463a03e8ac2. 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/QZNWU2371221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1429eefc8e93b876f65dd8f66c850c31d4ccb162634cab15a39834549e26ef. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6J2378242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2318f61d27d4f953a802186de883eb0d43928efbefd161c4fad04b5219417f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB92306858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a9583d3eab6e0fdd3a07552ab1c50ed419217a3013b1975b9e0e8e25c7cdbe. 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/QZDA62431062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc0461d8eb5ebb260b40920c9fc1452556378128cd3e8485f49170e969d8d68. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB42401445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fedfd5a54d8ccac122318f172d5492316ee02eaf5add0277420baedf08dcf1. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZDA62549057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0371c1d7d2229b288141d153d0bd4e43374667fbcd11d4672699a5153eac393. 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/QZK6H2581206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d9f27844ddda0852ed345c08f5c45ef3c9e2012267074083b6526212e2cf72. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:19:41Z), 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/QZDA72560671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de0218b38bf88317120ea7c4802d1e8ce9d1283f2d61caafd45bf1efac8d2d3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:49Z), 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/QT3EZ2419723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3955d380fbe4bcbd6bc0cfb97abcd85e1504e496f33afb0b2b620c2f07f5a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFT2528459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518ddf5556128301eb1f1fd25011c7b64d00101535105a8a08ecf625edc2d5c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZYFZ2503694.