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 0x302b0d7a59d7bb32888374736be2efcae1e8143db8e8fe577fe868bbdbb4d0ab. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1df84af9-7780-4e46-ad88-d9f8e121a11d.json and https://artists.proofprofile.net/proofs/artist/1df84af9-7780-4e46-ad88-d9f8e121a11d.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 0xdbfefe2755fa7227008400495b44c959f9d12b8fdc9db21490654628c9c24726. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/KRB921718298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaadfd50798a693b79b4cb079af96223f8d89cdff2d39fa846be9f8abe7dcd83. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/KRB921718299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc659122b8b5df8ff431aaed2025f2f0c003f43d2b75cb8f2b89cea28cd2766. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/KRB921718300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b9f96e66428d363c77261e532732e4a45d2bf3c2e489aa577571e20019ce65. 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/KRB921718301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd342de15849fb5293a4b3dce7a695c27b54007db8bca2e3bacb2dda0f74697a6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:20Z), 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/KRB921718302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b41aec8a162194f196a185109a9cebbf38d5303516443715aa5df9d1b033cc. 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/KRB921718303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360750fbc0185962e7ee3ad5dc6b6c063f2174ab01597026924a8237888aa7e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/KRB921718304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd776649f51c97742aef004a4502947b894d47b448f4d91d5adc17db00e659cc6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/KRB921718305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aafbd60e4cd56b85d10943d39c4a8b9bb9b1df98df4ae49fd7d4844f540cbdc. 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/KRB921718306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61234491ad48c0a44193cee532f6d5ad59c59d8523c901bba167bc9be28a08e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:39Z), 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/KRB921718308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500763785858948a340b2c948f76de7ea663b00cafae8dfbbf2f2f882e49c57c. 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/KRB921718309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2a6d1ecc54cabaa445c8880b56f79d0fa5020b68b31b1f16f1f0f0789ff16. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/KRB921718310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c53b3359929be88de7c0a6656db5b28a8770e490e71dd6c810928106c39cb45. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/KRB921718311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7500dff0d6a477674f9ce9be8c4b0aa4fd115dbdb5f8fa8ecfa0973356770b6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/KRB921718312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902e24ba850588c6f555f7de3b6de2e066322b760522b31cd7c6a3f66fc79df2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KRB921718314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124766faf9b3caf22044627ca75c1faaf0e91275cbc898a2b2df2ee4099dab11. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/KRB921718315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39792e7952b4ea94b3f8416f8afc9a89076602bc6ed6350f37b9622638d7762a. 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/KRB921718316.