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 0x63dc60068481556be0c76ef340e1975aafaa0a706bad8e1d377641d1be0880f5. 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/360e3d92-3846-42ad-8848-1d1dd1078a7f.json and https://artists.proofprofile.net/proofs/artist/360e3d92-3846-42ad-8848-1d1dd1078a7f.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 0xb460de04ab6ac9291967f42f83780fe2b82134499e9a71a1744cc3cec2134834. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/GBSWE0813148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99553c31637a944bcbda7c1aaa15c12612a3fad0e4ab0f7dabc382b5267e797. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GBSWE0813150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560bd59d0e42649efa922f1302821a59cf7434d4bff2873f721a50d0b8dc1dd7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBSWE0813152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ba0e5f6c65890d3c5fae262c246d50333c4b3104a2982fe371090d5c5929b1. 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/GBSWE0813153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62a612e9b64b7a6b8ed334cd3d275fdb8257b882d2c0e8e99362e271165cb8c. 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/GBSWE0813156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9e0ee7d77bb9d536aba34505cd373b75c86144c40920ea4c512876c4f50efd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSWE0813157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0025cc6ccafe27eca5b4414b379fab0ca6bd39af47ccf354db9aceb7e6989ee. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/GBSWE0813159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929dd029a2f258c04210b6f5f227c536d96c550daa5c6739d8825baa01e089ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSWE0813161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe039a0d4c626cc77663d2e2f0d6a2c5a141d0bce655febfe1942e5fbf6ddc370. 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/GBSWE0813164.
Cockeye's Song (Once Upon A Time In America)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d1eb0bb1561106b779a6b71940a2bc2432d53436c645a2357c12e646dec3a3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:35:14Z), 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/GBSWE0813172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d6ebc79a94350d26496371e9489c5691bd0ed984856a118678c7796a807b82. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBSWE0813181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53de1a276a29c93a20732cbe14175de261bbdcb2a4d15b02642ef31186ba33dd. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GBSWE0813187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e1b4c814fa359af1bdcbfa29e639f055f223d2bb986341ae3717e5e8513335. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGP2279528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bf1befc45ce798c1e8bb59174af60c4606e67a6faad711f44b61f5c71dadd3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAGQ2294901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94baea542c0460c0c0fe347cab8daf20b1295482d6789d80ac0b02596aef9f09. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAGQ2295145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b56a927bdafdb3af4c4e36dd6d4e5a5dcba628ed6c2258608e76cc8d3f4138. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAGP2279546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc88e737aaed4285b3047f29f4d149b597ad385499ff071f31a385a233e5a0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAGQ2294745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d8161c15ef3b1a7efb059411fea7b379830bf18bb184fac538d4a2eb41f3c0. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:33Z), 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/TCAGQ2295053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3061fa4dfb23e5c592c6301d1ca76daf46fb4fef999ea0fb4088172cc467b2bf. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:00:01Z), 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/TCAGQ2295164.