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 0xcb22066b36f02b7d0740b49869f9711c26238cffae837d54485139e65930e45b. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbfea90a-3a51-4806-a09f-9bb69ef76775.json and https://artists.proofprofile.net/proofs/artist/fbfea90a-3a51-4806-a09f-9bb69ef76775.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 0x1cb8291abe2308a91986b703f34b90a0c3d1d573fbe342359a75303a0e41c795. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:19:39Z), 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/TCJPB2474179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb189982f9801f0b3881b489b48d1b3649a91afaa985b717bddbde44f6e3819ba. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:48:21Z), 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/TCJPB2474267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599df5dac70d9ae19e45c4ecc42f2ac7bb7b0ae348c738633977cf170148463b. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:29Z), 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/TCJPB2474269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc3a2c53718babb8bbfab237511db99098891aefe42cc742e4e5df74c50aa0d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCJPB2474270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72206dcad5853801be333d166a2f2db7b6deb3e1fd57a5a74316460cb513fcf1. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:22:18Z), 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/TCJPB2474272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a6cb7ac555340ad3d9f57934467c0e65b55f7b2502a2ec66002f14c6023e5d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:33Z), 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/TCJPD2597471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65cf2d786b850730476c00055b71d8b4e7d2556af53556ad9c41c7daa7b1946. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:12Z), 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/TCJPD2597464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb304eb28d95357364c7802a58892502b93bbe10518ec3c89c41198dedf7447. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/TCJPG2575261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f12a69c346340111b95383daf9b361736322a3952a54a8357a6ab03f74b2cf9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:30:44Z), 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/TCJPJ2509428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b48a839db35ac63997ebf60cae2c42d833af9756afcf4e21859310089f16ee. 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/TCJPL2519442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1628fb3ae7f7001d9633671cf3218f4c886bd8fe7d65c62f5d1518bef67ea808. 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/TCJPL2519446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe686b98185ba5886a11fbb0627ddd82c0cafdb62c2ad5ae3ddd6b4911a5ca989. 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/TCJPL2519447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb6683f5fa2bf22fa12c3a1fa9945159c3f5de23e48fc3985467b2cec8bde8c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPL2519451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d2fadeb82d01495a3b0977070e3833ec53c3c02cda8001dca8582c0f29c5a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPL2519462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1628fb3ae7f7001d9633671cf3218f4c886bd8fe7d65c62f5d1518bef67ea808. 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/TCJPL2519446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe7d8b1d1027b9c505590c464c72ab6dfe1db077fe35ded1ff616304094da43. 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/QT66K2513262.