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 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 0x641022af8361b0237fd335bf911db1066369a3275b591c6ccec00d22d6b4b4b4. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eb16ab3-0e01-4b3c-881d-e1936649acb4.json and https://artists.proofprofile.net/proofs/artist/7eb16ab3-0e01-4b3c-881d-e1936649acb4.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 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 0xa0ad4b57e12fa9fe1aa7fca4f42e227e1849f22d389109b30e54a2cca6b96955. 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/SEVQI0303104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2027af0e02a028fcd8569a4b3c1ac7d2b20004d257f5875e639ff530601e0. 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/SEVQI0901202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c73cad4848620832798a839afba51a89bcbcc4ec6b8a1a42ebbb0f83e8023ae. 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/SEVQI0901204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996da48c83e450a70137d64fa9cfc0faf1304ac4abc2c99d662c99d50d55161b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEVQI9707101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40342d37430b0599808d4960ac1affe6ee4c6b854e5aa1511c134ab043196931. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEVQI9707102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9121dcfb1d9aa3c9bc46ab411d9c770328443102b98cfae2a26d0baad0093fa. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SEVQI9707103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d1649f3abf1f3a2aaaf61262580650a705442ceff73354537763f9fcca34cc. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/SEVQI9707104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83824be120ea5bdd9b9e115f5fe728f941f3537013cbdff4655bb3a2dccac661. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEVQI9707105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bde3818a7429d85c2ad332f3774c4126793ff11738f603c70c0307e0b029cf4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SEVQI9707106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e2da8aaf010030d9b121a74cbd2d82d09c915f23104bd526dd2c924a6bb12. 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/SEVQI9707107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7fe321647424977e8dea5e72ab7aa7e66e46b820e9f6f5fa5c4e3795de150d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/SEVQI9707108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38314f2c15138f456617f96adcffb0f6c2f01a2008e2cfc1d03124c06ee6348. 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/SEVQI9707109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e7c2358f6f4c9e8c8e611520e3b4aa13f9cddc95c5c25a3635f4972a1d886. 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/SEVQI9707110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0157b7047c107b4e0cd1b25a17a439dd0f5bbaee567bac17b71661e31afb4813. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/SEVQI9809001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f59bbdc08ac093188f2dbbc943dd7b0e8e4c61ca1a3ac356082571efe006040. 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/SEVQI9809002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18e9c4ecd506ad262291efe6f630c71727fc23394862c34db8f870286a3e47. 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/SEVQI9809004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1745c9baafb27a3f2ff1f3dde603b72fd7a25a00f03bf1e66375d85b84dddcc3. 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/SEVQI9809006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130ab9990f6ffec023e73ef941cc7d2554f2600ba4bd656e9af4dc80006b01d. 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/SEVQI9809007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8088409ec1c8d43dca4d57fd27bba42f5f8b5c0ed65f03d216fd76533b9b4102. 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/SEVQI9809009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30de27d0dab5a7fb96967ac9b5e48226c4a67cedc75cc24eb3147f3a96ac37a6. 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/SEVQI9809011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07de215b44aa1d2b24d0086aec02b8d3e1705aaeeedec243fe249fceca5f10a. 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/SEVQI0901321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d501304f4d270ce9b0abe64523b799eea98b8e8ad43bd3d4a6e0b03aeeafc48. 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/SEVQI0901326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb4f28f4acfe18cc9a930465e7ad8d35a92a593116bedbd1ef02720d8b485f. 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/SEVQI0901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bfcdf69c4f489920246d7e31ce5f9d90231afb4ae5a9e084d8142ef1a911b6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEVQI0901120.