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 0xcaa33a998bce1785c0003ade28397d0a7bfb247d3a7bc9bc86ecb9c81e51f6c5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8d4f5d3-1bc9-4d2b-9e8a-9b4632acd960.json and https://artists.proofprofile.net/proofs/artist/a8d4f5d3-1bc9-4d2b-9e8a-9b4632acd960.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 0xb6777e2b70d689e25b45afd776cfcf69300545e9d3dd2e3f0ef7cd95c95ff9c6. 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/SGB502357097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe723cf3ab4eacaeae0425a0c85c70696c9d763c83760385912904f6a3c451c66. 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/SGB502357117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59991d30a3da5eedeafd0168104ca26da23b36b310c9886e80d8accecb9a236d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:23:48Z), 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/SGB502357095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e2cbe1a70a965fbaf43f1a66be68d99dd9866018ab68cee5fc8caf3c9de1fa. 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/SGB502357130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29500489c884e0b55179e1314b1330a55ea1b7b8bac24a1119ff961eb17754e. 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/SGB502357106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6429f0940dc4579db810bd98b98ec4de0ba30999f15cc44420d4cfe461473f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SGB502357099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36014f03822a76c7ea83827b83dc7e29221e45ef68026d5e60341be9b7f3b610. 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/SGB502357096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2474573f78cc3f7b1636cebb2bb905a3d8186fe5840d3027345999dc7388f490. 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/SGB502357108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5752e17943a0b08a6b4fca205257fc0d16a88e5c55df1cdb0d45adab9c441dd5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SGB502357125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df815f0e4e9dbdfc88887f96e533fa5846335c31cf1ea89921e6630c1194b88. 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/SGB502357104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcccbfbfe1938dd61f85531e8af487ef764c01d381281708f4526b66a6973c70. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SGB502357102.