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 0xa37c60cfc1430c9ccbdea14a78fe1a594bc9d12e53c75dd784e938d07a9d854e. 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/1a403c34-7966-4302-8506-a267128cb517.json and https://artists.proofprofile.net/proofs/artist/1a403c34-7966-4302-8506-a267128cb517.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 0xd01d0980bc718cd5e65a94ac192504a7be8c9a6ceecde7d4e0ba59e486bcd199. 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/FRX202127919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd797bd23c4c022de83f1a61d6bf15f39fd46403ab8f4727be445b71267510843. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FRX282152988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10bdf9b73e1d20c3a58636a423c8081093b9761efbc769888a2f39ee765a402. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FRX282158239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec619863eaad2bbb8a478b09d3d9fa164033c38dcaf800d8b8e9359b276da78. 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/INA3W2200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac86d44a4c27490097080d7e6c533dda053a37430abac8e139fc1aa056487e2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IND292208833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7486d3c5111f54d348b93eae73ec25cc3e533942f88e273b7f86e5a0dde519. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FRX452340283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc7f89f9408d6544a45db000cbb3342ef07cf53b11fa31d62ade0b6626cc90. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX452340724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce891d07d746ae7a9174ab16299cea11fc5f2ec76c54128ad7d39b41e5c93ab8. 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/DGA062338211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772796deca1218e53cfc72c1eac5cc67474bc11610e388dfc72facdd155c9655. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DGA082397667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f35d6cd5bc21b3d28efa6b16e95e897e6f5793ee6bc9e9d3315d6f0230ebb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA0Q2326535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf259f96394c4d043c81f4bfe317804971f12c99a12d5944c4dfa63c2add1a120. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX202448102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e700ab135b3a2d07af135e9d3eeffb4bb0a5269983df0e5a72ac3caba27d2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/UK6822324637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd597fe17dca1a37648c1269ed453a1d25ca19ac9d78117f462977fc71cf0ce87. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DGA072428486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677837fb18a78c2540734c41725a3ef9824376e6416a948d72ae47b59148e4ad. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DGA092464682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96521a08e366bbb2d9e2508c4e1a3e21687f9beb8ff429ec2abe134e905fb8cf. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DGA0Q2417473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b4fbf658bcbb65f66fd2aa727b01ce99be215e295f4009d7fa6e5e28e21bfe. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/FR2X42594154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195cd18d480ff214277c770f653673fbf3551c0932b11201c2baeefc6e741df4. 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/FR59R2509897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9983432687e98021c7a8bf94255a2c6c404103f7d459e5b1c21487e121bd08. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA062554270.