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 0x39fecac2726f57fc75c8586efc2514d6d483a5f2313c36226cb6d189d44da025. 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/aa1d9daf-e1b9-4868-b764-c87030523876.json and https://artists.proofprofile.net/proofs/artist/aa1d9daf-e1b9-4868-b764-c87030523876.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 0x41b41625d609fbddf9da75c74b3dd4e542a264b370d5af79dab94c92eacbd825. 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/GBHLW1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4a54c87937403bb8ab19e704a2c78267003b88f00e1c9c4fb514e45d3bd3e0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBHLW1500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c5e8d7c8401c88aca25998cea49ba9c4089ec2acbebc21c699618d1d286451. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBHLW1500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ae63b1da2c90027215bccaa03828b80da63ed39917a763ba326afd8590107f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBHLW1500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0054ad47590a7b4b3ebf2ee9612af8a73b4d6f355f28021e5ddc04e212c604b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBHLW1500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cac5883fe9dd1daf8ed17e1f92672d9ec2309f1b0ae64f604a7b028a26bff64. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBHLW1500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa55d3cc4d8d680a78245519a8aab8af044814c323569505f3d1b53eb272b2a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBHLW1500269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8869205479767391f956138c282287b90aeb13953d0e0107b04246a2d0dde3e7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBHLW1602524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a66f98870180e3b9d0949efdaf37c7cb561b0df7bcd796a537274ced242f84. 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/GBHLW1602525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25fed5bd56930445b8add6164f5a3eb900192e6aa8a77d39af10335ef7235e8. 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/GBHLW1602528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873abdad8ec55f025d694f871b832efc8e6029d47f757bf40f40c0c619056e94. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/GBHLW1602529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42106177d8e7ea60e8e6ae994547539b030c9cd902b3c12da19a1d50f8d0c204. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GBHLW1602530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc677a83d87562397301a3a183510b7d1a5f759d082089841e9f2f5ee544a8ce7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBHLW2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658faf07fea4964cea6c1a7b34320ca7db46b4069c1ea92a0755882721f8e3f7. 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/GBHLW2300683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab3e486aeea63bb812553f486c85864e8edbab64a7d978b6969ed57b1ba9a3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBHLW2300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4b652cff1a270ab1ba81a9257a91e9bf5f726a5f04c1c56af9b44a45ea3b0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBHLW2300685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd157eccf5c3344e36ebd423d1e1525cb7b1395f19c3532739efed42f6fcfdc20. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBHLW2300686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e0a03890eaf631bd66784d4ad30b4a0a591c3cd44f3c575e6a50e8e9c38a97. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBHLW2300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4ae5b98a3228f687612d4d51739c8755b42d6fb87ef2fe66c2390c2cfa2e41. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBHLW2300689.