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 0x3398a6adc5d34a9811d5465acd2d1ce05a19fdc58768ddb3c5a503fba75b11dd. 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/bf72957c-39d8-446c-8c1b-4d79a7183821.json and https://artists.proofprofile.net/proofs/artist/bf72957c-39d8-446c-8c1b-4d79a7183821.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 0x17eebab155670b383705ad33407aa3a295b7571ca22c946284eb2bbf07616ee2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CAGPV2100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd10a16d3ff231ee71e1c30c1420c9078164cb515d383cda6bfdc620d1ee6c7f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CAGPV2100339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d6ce6c5fe73cf972d49a7d7a402eed72dac2d2f0be6751b952cb8157e07c96. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAGPV2200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81341829348aae1a6b95f386ac9009c068d1c13d980c7e5146054586739572e9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAGPV2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2496fa2d86563d92fe8ad73c043374c002776b226df873ae4474f99b0a8b16cf. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CAGPV2200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0586497291fc7c5adc79c3ee721ad3bfbd5c73338a28206d207ceaaad2fe9ae0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CAGPV2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb16f549532b759a9a39907ca56d81378028cce19757142c53d411fac6e9766. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CAGPV2200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b0bded030d87e0298e90f4c62ebbc965051e0127f2f5fd24fdefc2f5a4da2d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CAGPV2200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441eb3435dfa51455e81e63fa727e8a81d1cd5bbe1850fb48264d29f681a241e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAGPV2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd32d5d80e4212da1e8087f71c4d2cc52c49d99ec33913b31014c128050d560b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CAGPV2200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142ff233d607608d4e105021b0e5623bfd732b2e7c1fc5eaa7c2787ac3c97218. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAGPV2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5838715a78063ce218c5277c2cebc53213eaa59137f571a4740a106f6e2e439f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAGPV2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcb907a5be53ce1120d476412fe874ce88d94748c06ed092c4f2e53b7a523e9. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/CAGPV2200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3004d9958b8a2101bd7c030dd2f47aa01a213115de1142531bc79d720021ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM7282431777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bfe5e71c0de6175b38ba64c31174bc5af898c8dd20e6b09147c127b9c13731. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QMDA62516223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3245ddb39b6cd063bf17dce2e50acce889a15c9a87ddf3959089f4779b44d083. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMFME2535722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a534c6bede87faa8497e142692375789d3fb37f9158bebf173c924d1e470077. 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/QMFME2582481.