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 0x6b24135204222675e410dc2ef00749ca34f13e0f434217df6e0310f7c2d58505. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/095a7220-da18-4838-bf15-4d55434b62a4.json and https://artists.proofprofile.net/proofs/artist/095a7220-da18-4838-bf15-4d55434b62a4.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 0xcdf8916e856a4f1e663c08c680925fcf494e8431e668f001ef720a9e8522741d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHNB2542757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4660d312c4304c32bfd80ccfa6db92061805120626af2a17fda8d22141abf3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHNB2542759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234246c6a5cf109d612a2dc6f6cc65878328d0493aaab419fe90d5fded7bb9b4. 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/QZHNB2542760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe087abc5a6822a6c4d4412b11254441fce915666627b23035965429e0367e481. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZHNB2542761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b5f3b9e782c7c30ebcc331a3bd399986e4821005bf4acc903795569cf1338. 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/QZHNB2542762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8e90732a2f233c56f80515265dc25ba9b1e83a3cd7f5e3ebd7cb887d6068c4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNB2542764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4c7349f2a0274150ad5bee8a2e54b91224e262e390f09a6804abebad57693f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHNB2519506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fbaca9b99c3001c2cc7af1c9954f34b92e520bbcdf08dbaba54b495402f3ff. 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/QZHNB2519511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4410a94df8320eb056ef0076e561b92dbd0c9188cb407499463f908bbf22a899. 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/QZHNB2545553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af655718c5666c77bad8f1f833441503f53b4e702b53756923c9ea4b3b0c3b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHNB2545554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83e3fdd8c42c0e7da11783a664b166a01decc0d1d430719c69a4c7af448162. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:52:09Z), 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/QZHNB2545555.