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 0x5d0ce29d0d17f2aac9bd742a8dacea6244cfc79ce84e92689fe7492e93fe298d. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed38a013-ad92-4bbc-9c33-bfd9f263926d.json and https://artists.proofprofile.net/proofs/artist/ed38a013-ad92-4bbc-9c33-bfd9f263926d.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 0x938b9167700c984f8ae50b5c827de6a362abc3d874608131cd29c6093228a0ba. 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/CA5KR2303396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca5a8d2cdf83181468dcd3760fdc35e5b1fb2385ab432b734a9c40fcf2928db. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZS642493603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae0d88de8cbd8b1888091a1ace5213e6a5f7356dabc994d96cce34aa57c1a7e. 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/QZMHM2326110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d00a855befcb14ea900af4cee22d33656e23df423a421877ba8f4206faca7. 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/QZS632310672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c5ece10583525c08d006598116364f70cc08d2d0773f13d34954ce1eccacbd. 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/AUK3B2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250e75ab9e3052a25de69cdeee65d71444d6f8f9c2f61b91e71aecc6ee09d93. 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/CA5KR2331473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41855fb0752ce6ed3e361de1d537190a4d8751e58c8ec039fd4408eadcfc0f80. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZKDK2335837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5551306c62bc9c3233f2a3a1f9dd45d29c7d4018fc5b06606f85cb65dbdc39d. 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/QZMHN2270675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c8ed21b088a908017fca3423946512bff98eba8684e7063dbfc377be5dcb0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZS642194233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f48c02db645f45152787ca7ca830b68ba1e214f8424a92385deab3b8068d3a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDD2249600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7365a817688dc147434043967781e08683ada28d99ab3d5fe5e065bf18d3131. 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/QZWDD2249608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe217b4fe76d5b70fb9b308aa653d74a4bda9bbef6ebe51d341c5072c2964b46e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDD2249618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cdc19e14e2b57afcc50ac951f1d72ce953a397603fa81401dfd3e4c11c47e8. 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/QZWDD2249627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8bb62256c44e4e421430f2959e1692c3b3ab47ae1027df84c411835d51ec4. 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/AUK3B2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1616be3165e14c5c81e1d1e9a07969b72632310c40aafd916a6190426aaf7deb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUK3B2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9df4023bef62e27e9e43860a1f224e27d2dae7d9b59bdc97902a6973120253f. 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/AUK3B2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12ddca9003eb6ecb579c0f67fd9ea4a56b4e74af6fc19103752cb9eab7ad202. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUK3B2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e64e4c24651e5744cbf2e621b51f9625abc79e29f699f22f86bfd2706e9756. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUK3B2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f70f911f7dd4e18df9cf2a9b8c319d5e580c009b36702d5a877ddf47e6ea5c. 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/AUK3B2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbd741ea295bfde14c82b6733ecc125a2226dbe133c67830c09f5d5cbf352dc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AUK3B2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c5ece10583525c08d006598116364f70cc08d2d0773f13d34954ce1eccacbd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AUK3B2300008.