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 0x69721209ca31b218dea3a708a828933962ac6b4942be04484bd30aa5eec4e35a. 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/60203467-b51e-4198-b7b8-bc73900f5509.json and https://artists.proofprofile.net/proofs/artist/60203467-b51e-4198-b7b8-bc73900f5509.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 0xd0c6f8f9c21e8414e86a6ac44175b313eaaa03b6f360b467dc37bbda473914de. 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/DEUM72308578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389137b375f62f0325aee4480637e0dd28d7bc05c08b884e9b41dda7ce0ebc4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2217230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103f8236b40d857239cd398ac40523737fa1106ba64f51af410ff7c179776b9b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR10S2210514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888e445569e6ffd0ec0dad4b12e9a8c3e2a032afa59ec5911d2a728c5b6c95e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71603536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa861477cf34b42057684cfd60d6221413bf1d4aa237b961ff5b58e989c341b5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEUM71603537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f7ba6a28b3548b71948d4b4a724958e6e9336214c69b3610aedf3d682f7e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71603543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2906fa6bd785e50dbab1d99d78622a8f172f2013e84f6649a81e8a404180edc3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUM71603547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe582d27294116f1c7cac217b65210206473f478a8c0d2321b7c61655e4f0a7a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM71603565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6207d62a38fbf3e3a7715bb4a323a49bd391d31d39d6b354df6143074a38207a. 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/DEUM71603566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748cf8637f6a045a76d9b20ee4e7252d21a3c5f5fc811c8624977b0eb0919ee4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71603567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376d3732d002b22c5507eea410a8b33d6cb2a8869de587466de74b21e730589a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71603568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69417b383eea7ca1387a2b674381d6fc69c241274847f24e71363c5520dcc35a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM71503724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfc3d0fff3f9a025ac24c93e826b9efd3e6f978a4695ebaef75e8e35119d7c0. 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/DEUM71601192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6e80e4d9d0589bef0bdc293d236e46180bc08d416891cb32955851a08dd3ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHD2351873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6357214d095b9e0c1668c2106511bc78c294687843a93705a4515044c64e86a5. 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/USUM71602394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee81650673a51198f8505e6291c8b69c551040d935be03bf3a0f79653044d4cd. 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/AUHT01503050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5323a27b9e947fea9c3ec65ae6794ab9f4418add16fba23b25aa784c289b62c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM71506251.