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 0xceba8e376e1384f22aa2828a60571d887c256906dfe501c50dae9b095d5e633a. 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/8fe1bd11-77bd-409f-b643-d25d4bae51a6.json and https://artists.proofprofile.net/proofs/artist/8fe1bd11-77bd-409f-b643-d25d4bae51a6.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 0x8015374d64fdd3ded684eb166cdc4bd23d9e02b91f5f52fd073b1d1cf29080ac. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBSMU3191961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2073ec0ce5d18952b22caedd056f313e6ef379a1d759e92655f1ee05d1345d8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBSMU3191959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dceeadb7911b77eb767710d5acf4c3ce6e7246b23bc59efe0bc4205a352476. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBSMU3191954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca57a7a6e489c7caea523a3a4cd3ed021ff08fc40d35747e2ecf15db22199532. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBSMU3191960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ff921986ecc96dc594d682a46210ed56591be6c5b1397f6725a83ba277e27e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBSMU3191956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c35f3f617756c06ace3394645c62f122641fdaf71dd17a685b59d03ea6ec4. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBSMU3191963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b9782777b9ebcb318b2d3eb4ad97b303a63df345d7de5faf76d0f63796aa1e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBSMU3191964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21570939f90d588938d3f667910422230e2d69dda7439361573c83c100339e4d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU3191965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68308ae479aea930c06689fe92a1cd534a1bc8b6a4c1758f76485af14eba0281. 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/GBSMU6564236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462dc15e46734c64e4ed277528579ee73c2414c62fdee79bf12e488af45ffbd5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM91977678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c3082cea67b7a76e647dd5d0fb2c3c2d1b13b977deb3d4ec2d4ad3188014b1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:04:04Z), 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/USHM91977679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f08ebd5b921ea0dd5ebf048e4f9abc3d2ede1b37f1a0270cbeb65bc2cdb163. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM91977680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e879db93707329bd48b986102b73c5c8bd5b1a074e7a2e0b0a351226615046. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM91977682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee7c5dcd5650617829ab0b896e2806c7ada617d1666eff52c76df53575c506. 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/USHM91977683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395fb6da6d78ed630cb152339c7da822e482c3f61701ed3387d3751584f50acb. 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/USHM91977684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697eded6b34d3ae1b8bc4d9daa587dd218380216cecd2972e3ba7442fd5c7bb6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USHM91977686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0de798780786603eba6239cb8e1db1865164ce19c624f95db7d1147cb21de41. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USHM91977687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290def5c5e8a2d85206171f4885800ead8280c087338f756834ad340bdf8d0ec. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USHM91977688.