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 0x411b3d7161ab36038299d42f8d2218cf94a07a02acd97987b9ca37b2472ee600. 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/94d8d7d4-fbcf-403e-b47f-ea841b2b9af9.json and https://artists.proofprofile.net/proofs/artist/94d8d7d4-fbcf-403e-b47f-ea841b2b9af9.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 0x12514c08f476e1f03f06b2faa388563a5da845fb36d3ca904ed8b53e0aa74c26. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:27:25Z), 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/GB8KE2206851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d564e30dd60b3bf2865f7697ed1f600fb179769e0e3bee361e1416fdc5f45b6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GB8KE2215093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae95946d5551e751694197a7264e1501894b660d198201ea7faa6f9b4ed57cb. 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/GB8KE2316396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551125966ec2e1814e190b209963a22c9f414ee11e275063b66c344bffa18ded. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GB8KE2403826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa7179b423c0f5899f864c56836248d30e991ed061ce5fdb50518d718f5ad0c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GB8KE2404935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fadde8a1c6fccf6349e237688b0a5fe48c8fff368699f3a05d14aee7a75bee9. 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/GB8KE2405637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486c9c39a9dffacaca813576f82b8d5065534205b78569901d138e239dc809af. 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/GB8KE2408128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82461b808d1162add85c3c01087c9d631e22fc56ec9faa99329bdecb256613e7. 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/GB8KE2411703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9308cfe308a0abc37036baec5709c936a1dd07e3ef19de6faa3bc227510341. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GB8KE2416993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad57a62c7bf1b50f101bd0721a722d5c8e3deb0a13abfad7e22708f2a4f31822. 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/GB8KE2420088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde893da78f8717076123b109f9eb3083f4e92c772a1e60c32da59ad9b131c000. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:19Z), 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/GB8KE2422920.