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 0x49a2f48580a9034eaff3b16f4480b06a202838bb3c76502ec59af8f94e70f7c0. 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/98dacb68-ae5c-451a-a0b3-03e76369e3ef.json and https://artists.proofprofile.net/proofs/artist/98dacb68-ae5c-451a-a0b3-03e76369e3ef.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 0xf9734acd64480197d2d621f16e9b00ae48f63c1eadbcf82f3f5a7bbadb8206a2. 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/QZNJW2265882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc32aa3328bafd4c0fcbe88cd47d5e6df9ee7642eb1a23e35a7cf2e671586d90. 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/QZNJY2287365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469fbae5ee5a32ce8e0797924231dad97c6d08829c974c9315b840b3a1df944a. 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/QZNJY2287546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc479f5a6fef3b1cfbb5a4ebc5884e3d5f57ca3feb437580b6a561d3dbfc015c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2213189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7305fac2f8497402d7df393a55858f7fc9cee33bb1dd1d333e61ec062486a0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJY2297416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664355f5d960dbd772fa0d0777085c3ecf5d34a37a408ef6d845f87bc2184395. 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/QZW9L2262184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc479f5a6fef3b1cfbb5a4ebc5884e3d5f57ca3feb437580b6a561d3dbfc015c. 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/QZNJW2213189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664355f5d960dbd772fa0d0777085c3ecf5d34a37a408ef6d845f87bc2184395. 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/QZW9L2262184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebe7032bd0808469c69022315a6a2abfb0d19851c73118c73a838f929bd816c. 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/QZW9L2262185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc32aa3328bafd4c0fcbe88cd47d5e6df9ee7642eb1a23e35a7cf2e671586d90. 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/QZNJY2287365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469fbae5ee5a32ce8e0797924231dad97c6d08829c974c9315b840b3a1df944a. 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/QZNJY2287546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6354708ab8d2edfb6aa3748d90550f225ac1aecef873b361a90bd2becba93. 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/QZNJY2287629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7305fac2f8497402d7df393a55858f7fc9cee33bb1dd1d333e61ec062486a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJY2297416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e991e3143ecf894b1f8f2a94372a962f046262dcd9abd2f4fde43f881bb3c79. 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/QZW9L2262186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09929ac3350d03a5c2c1adefbf7f0ff2294f83d68c05b81d452458ee0a341979. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ8A2418554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0165467d0d14589ce71371776ceaae707bd1e9ccc2c4d0f202c34099397aed06. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ31900813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf23c92d916653ec6319a605cff4a7b6a7e268b0bc9b0d63411eb7741346fca0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2453947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3969e2c7e19fe3c70fdb7f3968385d2b731d3f36b880b47e1bac5b9bc9177a4f. 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/QZNJV2134123.