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 0x2818e7f208cb93635c237db2aea5faa3fd9758091250dee73f71c27da9c42770. 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/e844b2b3-5417-439d-b002-8848b7534372.json and https://artists.proofprofile.net/proofs/artist/e844b2b3-5417-439d-b002-8848b7534372.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 0x3115537d6982ef1fe73aa310199f2b7850eeb0f9421bf51792d0a23c400290e3. 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/QZK6G2162218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f7d0071df787b279dfcdab573dc2cb3320d6b3b8fc594bb55186831eb62502. 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/QZMEQ2122963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663c9a206a283959c2f4d9b18798272e1fba49b480a57a67d230d32920df1543. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEQ2122964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d1216dca37f6f6f2f6899a978a2ec172c081609ffdfbf51a378edcb6e4cd54. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMEQ2122966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb8aab2aaa61452f5c1be2e61c73a62826a0ed318cf2862301f02ad5dbb87cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22282079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc158b00740d74d4244e2c44c616a9208f7396ec506d7d6f5da857ee0366d822d. 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/QZTB22282082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d40a27ddae6e15cb2788bee4f53961b0be749d97a6d7c5048127e7ebca13c0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZTB22282083.
Recuerdo de la feria de Santa Eulalia 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4b98d62e978aff7595607f43ee7147d00502bdf63cca5bfa0c902be04ef74a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZMEP2325720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eec60c7d25944d757209c5144de6537237325b286ab88cedf4496d53730e60. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZMEP2325728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824f9eb8c7a62445dc72ae4e45dc22afce34be3212f3a9b415d8e42249d3f2ba. 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/QZWFN2327454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caa4cb24880c19003df76bdce20cc0c3421338479e5136ee6d20c87070c66af. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ762436071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8968129c1f9c01b162d580a25049cd8e1465ed32501d2f0efa549b653c2c246. 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/QZZ762436072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0675621b025d3aeed198e66d472c5ea8618f32ec2cbc6867376c3792bf26ab28. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ762436074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24b48feff017a512a781028ade8ffe2cf67dcd40a93b84b756a2fbe22037ea4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZZ762436075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58743ac757b79d6f151c3cc5fc4170f05ad619ab5c5ee272a73961005e342b5c. 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/QZZ762436076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3196b4160bd3e3a7e5d5b3cb2cc557ee7ef8167838f775c129f2e5b363921645. 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/QZTAT2536415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d521950efbd60ed84e48f0c52d60346efd75634fa292be7dd44c01692c51010. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3FH2519980.