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 0x3db8d68c71dfb6f9ec1a3c1e93af75483b3e257ca2ffeafc3676ee05a04a272e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8ad6944-658b-43ee-bc0e-0ab4b6c53681.json and https://artists.proofprofile.net/proofs/artist/a8ad6944-658b-43ee-bc0e-0ab4b6c53681.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 0xcd596413e1a94c784bcf3f6d834dcfe9a9b1c70f20a66b416d07bbb92f5e6e16. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKQU1867576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3830199ab0381b9eb2693be67724e574c55032903add0f60bfe0a8ee9ea201f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:12:09Z), 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/GBKQU1867577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303549bb3d080a76eb61bd67cb55dcb32ad8ef78454110ffedc3e3bdee5948e7. 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/FRDKW2109188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e2d6dba7c7a9f16c750479cceb86c3e2ddd7fecf435e80a082fdedebd4020a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:50Z), 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/FRDKW2209935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4229191ce0de87a500a644861cb765ddea48b30c241e1ebb73d5c9ff3baed98. 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/FRDKW2301635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0472b0ecddb1d6feeebcb6c60a19b900f5511ede1742e7816d7bbd20171a7508. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:34Z), 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/FXR642400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a41cc38f858218d3cbc34b855e151d81a584c657c213250ee218d0890860e4. 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/FXR642400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad114c8975d33b17e8e6d50ae3d4cbadef615f6866275baa51d9b3aa03c968b1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:53:12Z), 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/FXR642400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0472b0ecddb1d6feeebcb6c60a19b900f5511ede1742e7816d7bbd20171a7508. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FXR642400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5422788f3749fc279102aa882a4b34dfe300ad7a76184f1fb59539aff123f1f8. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FXR642400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad114c8975d33b17e8e6d50ae3d4cbadef615f6866275baa51d9b3aa03c968b1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/FXR642400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0472b0ecddb1d6feeebcb6c60a19b900f5511ede1742e7816d7bbd20171a7508. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FXR642400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a41cc38f858218d3cbc34b855e151d81a584c657c213250ee218d0890860e4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FXR642400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b886655d4a69ab8d279d91abcc3806d79a3ea5a6230f7d9dbceccac97a85ef. 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/FXR642400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5422788f3749fc279102aa882a4b34dfe300ad7a76184f1fb59539aff123f1f8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FXR642400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad114c8975d33b17e8e6d50ae3d4cbadef615f6866275baa51d9b3aa03c968b1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FXR642400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a41cc38f858218d3cbc34b855e151d81a584c657c213250ee218d0890860e4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FXR642400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dcfccbb5407fb85d123c22096685399602fe751ebe198f2b6b00508dce84de. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FXR642400030.