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 0xf275f13411476abbb982650a08afdf953a490d3bc2408e1d4894fd0a918b3860. 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/61d2ea90-fe4e-4105-9419-d9b518bb43e1.json and https://artists.proofprofile.net/proofs/artist/61d2ea90-fe4e-4105-9419-d9b518bb43e1.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 0xc3286dbceccde7a1e89d4aa324edee7cafef360e98ca225d53f4bfa41e543052. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGWW2004043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc327ef341d1ad329ace8998bbc96945beebb9efa847e31eac47114c8d3d02a10. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:52:26Z), 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/SMRUS0064399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1c7ec2d26a9cc3658abf17d939972bd50de7fe3b6883528d4a87bd2b35ec62. 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/SMRUS0064400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91105f37e0e5fddc30c2a2451d253f5b515e5a2656d419f4cb4e99180d686991. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:06Z), 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/SMRUS0064397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a0dbe16a22bebb155b7e7e494f7eee41f5a82a66f0a97befdfb612da61298. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/SMRUS0064398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc327ef341d1ad329ace8998bbc96945beebb9efa847e31eac47114c8d3d02a10. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:58Z), 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/SMRUS0064399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1c7ec2d26a9cc3658abf17d939972bd50de7fe3b6883528d4a87bd2b35ec62. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SMRUS0064400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21227b5d03b88c952cbe5b1177861efd90979a75b8f1740a05127b40afdc5c4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SMRUS0064402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2984a3f13403e2f5d3d2bb2e95369ed95572a8fd958c8a7da8ce5ed3d33c5377. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SMRUS0064403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3df8a39395b11eaa862a3461bfe4302959de901d6aa0f925082d427c1bf9d4. 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/SMRUS0064404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91683b100735af983f3c909e5876ea2ebc2adfe02edf33c9133685688d2e1b4e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUB242184101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0679561ce2a433406881cbc570bcd8b408815829d9a6880117de4c76e64ab26d. 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/RUAGT2324835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b6f041b47b952828a73d70b19ac1a5e2d3b01580023050422424f874f6caab. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUAGT2473381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1bc107c9086924d9e507a6e9413f83dadb7249a77637470bf6e3cc19073d85. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:14Z), 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/QZPJ32421792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b8ddde9ec17df9a7fa528488fbd957ca238c7152811b99cddffd73d66d0cfe. 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/RUA1D2567516.