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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553b4047eeaeac9d2007e60ffb45e168ff3b16f1d39e4773529a47e6515bfaeb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6929f6ef-ff98-4830-8087-ab0fa2dbb418.json and https://artists.proofprofile.net/proofs/artist/6929f6ef-ff98-4830-8087-ab0fa2dbb418.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb483e133a56a4935306f47f3093df6c1d7394f7f25863a304675759212ed90d1. 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/USCGH1807656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f0fe147ce1741969c06f3c43401133026cbaceed8121d2aa8081b08210a7d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q1852351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26ec6e47dbfbadd0ad3f90f6e466e63fb798f7a759e3ad00cc64160da0750c4. 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/USDY41978127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7142704b9f6f7ee9494343aba3cbac412a192fcc51e4fe0f41abcdb83b7573. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAER2003652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5080fa57785aec135033eb7419042a3655967328758198001ec477cab83eacc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2099750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c64a081522867e5b7757438e5981ed498262956fb8007dc242bbb04813c1e3. 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/USHM82061031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3219f9b974328eacb6b5440753ccea7d2927d43adebf52eb50045f0c7d0d51. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFI2143241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fbbabf26b52a42e7b59d89f7e5c795b89797975e2be41c34678fb5c217c607. 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/USL4R2208209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2985c49f01cea1030649aaef7b3d096a950056102809e04df3beb2e83396a04. 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/USCGJ2496126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ca14664f0144cb369ce2af5b9f1cec731dd631eca087f3a8735c102d2754e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB52468338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1335624468a69da0f83f0f015f42956f7386501e5d3bfa678e502ee83d8092a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA62249763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f27f9cd9a0167c34eb6b74784b9b7a3355e6c20278d8853b49be53ebe008cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTBA2291800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f02ebe1ba5d30c65e40f777b34c78c3e7d16cc94ce67c2b1c7d9b4830205c6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTBA2291801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c791a4aaee6c305632f757d5f88d09642ed3358df7e16377dae3443308531. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPLS2189035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f2a8d02d40966eb14201769bd2a48b1b2765a29ad1507e8831e6ee01a0b13. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH2014799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b1bbcc3334cda8ae96198cc52cacf3821149bd55338473669ac951a1c1b40e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES71966058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0a380c1361e4350f0ae566181fedbb38af321778c31dae100fe8f9ebe92a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6A91843008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782c7d9d38dff5b140c65e4212fc0dc88bcfece340c1a94d0a153be1726eaa3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWZ2461938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7215d3a26f13ca065106997c0881b60f35febb2cea3759227bf6c6a1627dacab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES62235379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8173e9a4cdfbe0426362903aa293e26468b986e194022aa5108d586926080a41. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZRP52195960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca9ffefda2acb12c49dc7eb0869e0627c4704ad4eea2cf0f11976f19f7037b7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZJPM2000727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28827197ddd6261fd467c98a99de80c751b196c5ed93e4cea10fe07e322c4529. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZFZ62025122.