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 0xb76c2603d9cbf574dcad6e26ffb4be8c6d5a68fb734b4128985f09104eab1543. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f371963f-8d14-4233-a3d3-e09e2775cb84.json and https://artists.proofprofile.net/proofs/artist/f371963f-8d14-4233-a3d3-e09e2775cb84.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 0xbae2b17c11413b36456443734675d4b6378a082813e3e31c99d273885af098bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXAEO2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15279f9ec1de2041e2591c49c3bfe246c66a85476fdc10595579f026d3a62f38. 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/BXAEO2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd956832ed988b8a315bce007b9e7e4d3689a24a7d94aeb97494317532fe6bef. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXAEO1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e510bd8f0693c4791f8c548a33798ac3515cf9d701262aae38b0bb52145cb4. 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/BXIP51700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb9fa088f38ada76eccdf91b30c77e51b07827dc0c0396ee9ccd34007db28db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIP51700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d6ed1a8c2fbef16ca8abf0113647649ebf84271fb3aba05e8d44f39b7a93d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIP51700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4df6be0d819c3487e225c078c2c84f0ce2478e0e8b2568b0d2fbdc468ce1a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIP51700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe0999cc21bf434eb21937a0f58e34d33abedc7313efe3fae099c9bde020594. 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/BXIP51700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc341026204b185f13557a891fc01bf7d4cbfad26dc8146a157633b43b3db219e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIP51700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccdd289861712b3bb91e3f2f00f12ed88a81bcc3958a6557a69992db8e0869e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIP51700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f92893cfbf795bc16632d4c1d00127ee5cbdc1671babf9f98a639db3883e06. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIP51700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b9b03980970cef5e12d55397b17a5dd81ba65794ba7166832bc22c572db064. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIP51700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b739b1c952ec91dc9016ab9e06365c963d4e65a2451f53d8d6b787b863b964b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIP51700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c09208e25ff1bc279bd91cb7df49b8b33d04f602da7bebae87535be0f11469. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXIP51700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f5f327ddffa62f6dcf1e3e4b08a0ae850e64384cdabe0c3865186c1790f00f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:37Z), 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/BXIP51700001.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee00214b8156ba7be8ac5ec3b3f611a4202e6db3ea3f26334f5fe391335b605. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXIP51700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521643544c2e8947c9f18e138a4a287bdf76285d8d7af31dcc45e7099db211f7. 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/BXAEO2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9b06bbbf6cd84f8896c2d83545e542a5f8efd3eee0e987ef1f266b9bf751c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXAEO1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92bb212f0cf4aa4450cdbdbd38cab87276cd71cb73aa2431f5391ed9a86fc7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIP51700014.