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 0xa1ac1bbb2e52b2b40fbb0a9251c354f4e78d2733adb670f77c8074ba9899a12e. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2abd740-6272-446b-9d0c-74e97c498d6b.json and https://artists.proofprofile.net/proofs/artist/b2abd740-6272-446b-9d0c-74e97c498d6b.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 0x954df35b4cb396c331fd59bb1d34f1db8e801856e368469f05d8ffd846b40e85. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS672450392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6a58f2d66877f52ebbffb561cd29d12e56c26594a31615224349ea4b4796c4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GXF9Q2419669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f8a5cb25448b20e36b9ef4b2f4fe70399e0494c63e691250bd885b44020224. 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/GX53U2417595.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcc14079df4e3f3119334203e67913f5f2530f247d0d327c3359869954229b9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX3Q92547431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ee443b1f5d13b598bd7285dabeb9318e170baef6c4a6071901868a3e0d134. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GX3Q92550753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe938b0cc150de22efcf7b29e278a1f7cafb95b6b625a525cf021565c09dec7ed. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBLFP2585006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1881273cdf608969b7eb5fbbc5daf057a0e516a12e3914ab8eb356204c9b293. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX53U2518533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ef029a53b1b01ad557d9af562a53e0353f56402c798faf8a3fadbe0571b00. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GBMA22556894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db2610548247c1fbe86cf58f33adc8483ab1cecdccf8fbba3ccdd1f6fe5e92. 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/GX53U2510429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea855a3b13e140bd0ddc90088308efd18771a823f4a32d79f9c5bd68288a3b2. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GXHND2538879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b98280d470c8ffa2cf01d0438fe8e0b1bf53f64646701c5e1979b0712d39a0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX53U2683935.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966421b316c8d27d35c9ba6a63b434820a2e96ca007610b7d2ba1d792b0c130b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:28Z), 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/GXHUT2501406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533c159ff3f2e3f8490921250b829f27dc1fd87db37475e2b1f73f8f04c9caa4. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:07Z), 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/GXHUT2514972.