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 0x1c3616c89e14df3d7d7940b59753e88b5e2a6e97cc6b7f6ce17af07c0ae6e320. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01e069c5-69ff-4889-af09-ea4ed6fe09eb.json and https://artists.proofprofile.net/proofs/artist/01e069c5-69ff-4889-af09-ea4ed6fe09eb.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 0x7eab7b8af346cf745e556ccdbfc6dfdf6fc88af53ac27d2ba6a2b44112ab9fb0. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZES71961111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b89e15772971996d58cbae7720fafe2e15ef52c985537b88b4a927f038038de. 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/QZFZ71907749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ce7a0e3967624e990136c357218f65f3ac7ed8ea52fea4fafc5e772155eb0d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:53:24Z), 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/QZFZ32090139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f14d03125fc7e853042b460fe4a71d415e807229ecfb220eacf008e8f7b7641. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES92323298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368c95f8966c733920887416e7a1945f250179ed21604e8a545fab14e11f7727. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN82323499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50c228a312e98a9dae684c13ba14d8de1846bfee4592f590f7c45761014ed40. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6L2361165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b857fc7561ff57a9a24dbcdf547df34e2277280438c53bebbce94b75677c9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWY2302917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791806ba3c0df614acb32106cfda80073526ee78a7dd4da59aaefbf1976550d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6M2499486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40578d84727ec90d49fc3481a52a449f66b15e941b47cb54e3d549a14b28ec7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPLS2449890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3622b80c666a391145b0085b98e8c37f993ad2e2004737dc27f63805ef981b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB72407809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50c627cf4b304f7c277cb3fe083b723bf674cc84fa6b2f168a9f283385f02df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72407810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ef6b2aa93c0be360bc0c3b2d397e89468aa7b85934898a3b8a3c1f8003d32c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB72407811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f28fba748ad23a6cfb03301016e73695f30205a10ab64ca43d7255e895b77ac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS2501014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d7d45f8ce2742ee82fc94bddc42bd3ef3ae9306d1814d412f61491eecc7f92. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2291245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab3ae667cfad62ddfb99efcec1340a85c3bb5347bc606a4b6bb215ed5aac4cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USL4Q2456853.