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 0x42583d80f0e50d36d8316b6c3fba139f036df51c0cce67b64ca9767140f5e507. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b211e30-5d77-4a48-8a31-70f5391dabf5.json and https://artists.proofprofile.net/proofs/artist/7b211e30-5d77-4a48-8a31-70f5391dabf5.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 0xd3ed7d67296af0df0b314c0301b62b1218804d99eeed0a85f21903c62fb4a9f8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NIKIT2200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3022d182f0afefe4fe5f1b4562464a660748dc3165fd15c22ebbb0b95f992f99. 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/BRUSA1000379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3977222452b6ff5f54b8c030dbd81a83be823a3edb3b8338327ad4c1bfe22e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRUSA1000381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782d14f8a63c8a129a6349ade4fa4ab1cd8c71027db5ad15e27449a4ca0359c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRUSA1000383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121618fc6db4b6d38fc0fc3a80c456e21b51493e86e27ad8142f61cafa24146d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BRUSA1000385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd249309ffe8ca5e8960fd83a226fb2f39d52c3bb4edb24d27426c4de2d1c49. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRUSA1000386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b43e3d31f7cecba229c173744146722ea89346ac123e2e4d8710990d468a901. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:03Z), 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/BRUSA1000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364d3a99e71ebef2e0770d42846caedc374b3c8bd90a5a1441da74d32b2d80d5. 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/BRUSA1000390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f5ea6f5c2d1eb3c82ce7cfdf70868ef73a21f1a7074c27082e508ad8e9dd19. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRUSA1000391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfefb3d3e1ad3220edf13ffb4acc3b086edeab5e564dda7588d707797444991. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRUSA1000392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6291f836e6efb1d83b2de7afa645b14e2c71b122f7b2532ea1ea071b5a96b689. 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/BRUSA0800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7527d063abc78f44ebae5cfff7c3f7d432294b34985379c38bdef983dadf5c85. 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/BRACT1602257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daad812af095df156805365f96cb981bf83d702155063046fa49eaefe6f0135. 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/BRACT1606984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c9aefe1d51bee0d06d43ccac4313ccc562594acc6a45297779dfe909471a2b. 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/BRACT1606828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f61787d2684030f0a7ef35befada7d8270ad52a21bfbe9147b214fe16ce967. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRACT1603754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e0ecb41fbb173b5800bdcfeaec5f25ad1d38c80a0e7f4d80d3e0b54d413fc6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRZND0600067.
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 0x5194c8625b6efe87177f0fc171abb49b9903bb57b65146c3df6c217aee96a54b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BRJPA2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad93fdbceeb2c12fa8401073506822cd03bdc80464fcc1d5891d66433915d074. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRACT1606811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01459a8875e5c3e3670901dd0ca34afe7884253f232a19870df2ddb38500a7c. 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/BRACT1606820.