Gracenote, Inc. is a company and service that provides music, video, and sports metadata and automatic content recognition (ACR) technologies to entertainment services and companies worldwide. Formerl
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 0x6e111e4bb5956221a3fb5119d5362096c34b4c24065c10b2b0326524ff85fd91. 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/18134b0d-b38b-496a-873f-7cf1da56fff4.json and https://artists.proofprofile.net/proofs/artist/18134b0d-b38b-496a-873f-7cf1da56fff4.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 0xaeffe0c95b64655d32abe5d53dff29d039d57e7bbe6859ade66767195442a4da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX871511446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15223e61e16f486f81412b4fc26a470140fda21e21b89b3c0fc474eadfa5fc94. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRX871511447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebefbfaafb160ceb6bc6bc146fd6ef991a706a8806f4018b4a9f0541c13d89f. 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/FRX871511448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d30f07c689770b2e5f1bed9822b41a72a11c8ab9f09c49d56a4762ac7d235a4. 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/PHW011600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe074290fe707ba2da0ce7ca0c3f8fae3c6103c12068e9c525fca3ca27149e4bc. 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/PHW011600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7478f1cd412513577b26c90fe4ca026510eba36f8936342ae53e701185102adf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/PHW011600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77a2c249c269d6cfa2baeb4c3a904064719d02f9949fa2325d392634c5ce0fd. 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/PHW011700199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822f00abfba3a0d6818a72fc2f2a38af28792af2309c8a0bf57102e7a80dcf9. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/PHW011700333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c232d8c3ad70083954256f79206b46560121531d4f5743fe10d87c2d55a1532. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PHW011900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b4c882f44ce42d955d103951c63c1387d9a2f7d02df5d7bda9d28e7a0bde18. 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/PHW011900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c875fdfaa330601b7f55403d232fd12e9909c848b0dd8d1d042fa90c783d361. 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/PHU011915838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b965a71de6d255b500d0be800bc5b32c50d4e3863222b91ea91423d48ae1006. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/PHU012015897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ccc6da8731c28b6326e730663a33caa3c0540cf50f4f44b3e2d9224c8f2958. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PHU012015903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bafbd70fb15d37527a81abd011511d4a60304cb2b552fb49a2d153e1bd8d37. 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/PHU012015970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f469d8e7efcc4cba0dadeb9f60675071e5eb871cf8c376b1c1db96d91a7058. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/PHU012116131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f2e54b2ac3f375a362f09eb6977b1771b7358cf457f6f33baa52c9d42d3ae8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2261373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7fdc34b36be5a9b6d82c28a2f7a89b1276273f6ea5e88c5bc20b631ac2013c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/PHW012300060.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9e0d16d384a5edc10cf62d9e1278a34797a141340c616b206d24ca0a164bc. 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/PHUM72400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8518a46a47709d5fd176b33a2b898ffb8fc3b8a0a01780ee502bb4022e68dfc9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PHUM72500134.