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 0x32f323c6708c3c0313de5d5278332876677684cec1183fa75ae676ee5107762e. 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/87090ac3-58fc-445f-a751-2da803f37085.json and https://artists.proofprofile.net/proofs/artist/87090ac3-58fc-445f-a751-2da803f37085.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 0x11ab6e9ff1793a655346e783dd4bbe130547a7c553a78f2d78c60ef96e1290b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z1926471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d99e0d5f517d9bb2099e4be1dd036c22829ae7c1f8abd786131a517daf148e0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/US83Z1927886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eb98c0eccbd3f80f661461f3f17444da9d4ac3206dcd1ae50c47cc15a047cf. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US83Z1930448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae458c7fd0b406a24993948cac53779fdf0fe1418c901c5060953f356f0aff4. 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/US83Z1931128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabe0271e19f6543a2b49fd496c9abf83a25666d81aad30f7f160216be4b7aa2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US83Z2008989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe923119ee39940529ad1d8d37a89b999b974309c4cb295f7ab8f99f654006d86. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US83Z2104225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd278dca8d1183eeef56fe9fb50514448608335664c84c8d4e041a46c52b6e01f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/US83Z2104221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58701b001f2615f28c55ec93f0c2c1b16f0da4e9af76559fc2f0e3378ad1cf3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US83Z2104222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6093a84d28ed52fc303b06c3c74bd622b5c9d0450c653949ec1d0c6f0bec11. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2139110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7bf66b87011ddda4e1c1dc6e376578a06a542d984204ab64165319e213330. 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/US83Z2201071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a6ab2fc47352688b0e95ed205147512514caf9f8b191b5db2192f5a2a34178. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2211891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a2f94258ab72f4435f496c373a43f44a7b61fad162fc089bf6c3a2ba05cedb. 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/US83Z2229759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97407b51701300a479c59cd2d905c88949209f0f08b41a3e41e719c6f889ac4e. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/US83Z2327949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7e47957a94bc3faf6e2fddea27288a2b398e95e775a325a2c8e5f23d4ea5b4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUAGT2306741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f30e62330fe0440aeafa7f0f9c748453a19bd5508074da96b2eda15bbe4330. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US83Z2355392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b088c2658e146c84789ffc26ce27182bed22f72113f0171cd6a5dfaba06b9f7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US83Z2475592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b6871b5bf00bb974fc478918d705347d94f875573558fb0c6ba115239ae574. 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/US83Z2483232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1505ad7a88ebd625e0be54d48665f3cdff86aecdb98bd5e1ac508eb720063c66. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2495805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7a266d500e354a1408d8e8a56e3ee7d13b59a9a6a3de3d16e9d5ce44627ac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2412029.