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 0x761260b226e4cb84b2527eb79a1e3d615d2251c2b86f2ca5ebde46b68b77cb1c. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38c912ac-9379-4f6e-98a1-7c1592768a65.json and https://artists.proofprofile.net/proofs/artist/38c912ac-9379-4f6e-98a1-7c1592768a65.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 0x4ac919a0cb781324310b69193eddcc664889afeb360b15e63928b4cf5c54037d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA0Y1500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60fded2a3467bb1313c8181f6b88ccbd560d280b20c0c1c40aa576f008f95d0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HUA0Y1800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3552a2995cc5f3ec199ac5be80195776a8affb6fb9411a462fb7f29916446f08. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA0Y1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71573cc9ffea1cbc35372bde2daa5e0c79bd11a99a2d76fe3e964d52c12c400e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HUA0Y1800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaa22ecd0ef674b659273c53c943aedf2c824e9749db5eb4cb0521ae1987f8b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HUA0Y1800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1537d23ad09a96a72452b0c38abe1ee862f52d53be05a92d3195f4bfde0d578b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HUA0Y1800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972464f8126a240d93360c49c7ec0cd7ec73c9d8e0b3554d1133c146988eda2b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HUA0Y1800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4893c0aba97d893ffe31e0d251e84ad146c897daab1c480998d9ecc08c7b2f67. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HUA0Y1800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb54cc124270757cd32f001285500c561422e23dded9ed02eacb47cf3b8f793e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA0Y1800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbd715c836a184a125156855e8289153eeae910cf88094edbf0683d4939c878. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA0Y1800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8803225786a63a2a251ad6073323e8a288090326d8ae74e1b767edb159920819. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HUA0Y1800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd880b8f25cb648607158a27c3900cd4bc6e404a626a6a9642d5a37dac22dfb1. 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/HUA0Y1800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24d5642977b55f239cfbdc45afc5cc2a2d86bd9f013b9fd3aee33e21c53b159. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HUA0Y1800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67c83e766137a6a29afb08dcf11b9220719203c77a085c5369899a39cddc1b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATR981295449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617a95a10b76815bd6e9ef406a49646365a2716004476647f35269b2b0b622fa. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ATR981295450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbd99aec2d224d8ecbb751ad37121844804d0679b7418a94923b85718f8d3a1. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/ATR981295451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f5731e7c5c165f748e3e0e1a732b2cc513dbfdfa8f7134e2f9dc546a6bded3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ATR981295452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf975eddc29cdb1abf1a6e0405389eb2f1dfbd6e70bc0477bff66c1d707f39580. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ATR981295453.