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 0x59cb20a59bd6e184b6e6ef545c365ef8b92f79844c8f1bdc13443d84c4e1682d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a34ec4a-3c3e-4054-bb0d-d468828b34e5.json and https://artists.proofprofile.net/proofs/artist/0a34ec4a-3c3e-4054-bb0d-d468828b34e5.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 0xef663f9e566baabed40f54b00f6bc5277c8fd553167bf5560f7598b1dfc5445a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaac315ce777ed38a221482d45b46a919e4ea9f1b98a844d8b2948f456adbd3e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMYMN1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a1c2653b3a7ccf89f65187ef665cbbf313d111a08e3dc66a12f72774dd01c8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QMYMN1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af3683fe666efc6a17e3dd27d4a494a07e03c297778dc40621b865c8cb6dcf6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMYMN1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da72c2eef308db9ae3dfc0835e5d51ab560ee12b4eafd8a852bc9feb622a0d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4a43459ac2fbfb6057aa68b8fc17f27965e5a5300583817df3ac8c48a9adc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMYMN1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088d32517a58f9619b4c2ce45fa7e0fc08924d7681b08c156efc4c9942fe3aa6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMYMN1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efcfcb9f804b0ee2c877d7498704d22217106d6c277d06a8f5907b820cab414. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMYMN1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e1f683c0304e5585bd31997de724f16cc83efe449cadf88ab3c4ff503c3811. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMYMN1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b17270ff5b4421405339f42acde9bbf5e4a5a279b0fccd7ad22152a1efa72a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMYMN1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45832ce59e923a8ff121a0f0e43377ea4b96f0b2cec2af63fad322865f5a2ee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMYMN1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4a942acfabb44a37c6a6ac8054a68959e0aec79b720939c01ac34178939caf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97a8ceb4a3930868d432b46de47df968afc760d4c65d2a5b90e74a530ee5abb. 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/QMYMN1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aa880997d065b83e00a897f57fd5faeba40327eaf981acc56fe249176654b2. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMYMN1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b189a87f8a23ea52205ab9ebd899fda3ba798b3e3edae392560a8b6d4a13e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d6dda4b924088f472ff5fbb135b2fa966030b76602fd0596bb7bc740808312. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QMYMN1800006.
Latin Brothers Medley (Sobre Las Olas / Fuma El Barco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb73bdb58dc2aca31bec4f13b0c35adc46a972e867fe918f16648f940377e653. 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/QMYMN1800007.
Mucho Joe (Amerindio / Las Cajas / Tumba Techo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f050099f6cac4935e4245790f567c9b8a496934f5900de377abacea146d40. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4fac7b8270db8f6543635cb90c7a9720559fe7915113b5cce497c8dda1bc42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c1bb6fc74ff377d64e637e6fc625b7a0d0473e1fda15e9543baed06cec670a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMYMN1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b29c7c500c0e98be448d9786402f404250d9390ee101a930eec1c084c7658. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMYMN1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba778e1555da1b1dee9e8a3c3699dd331460d64c905e863ef5aa0e90624886c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75a931692ffb18184336f22e3ccff856a5dd2de646c13369fa5456db8b5008. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QMYMN1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf42de78d0d2e34e996fa14ccccb3ea80c497a4c284890da67145bafba64b1c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e48d34b96fd11a84c338155ab92ba522d3279d474486940c2e124e5305cd7a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMYMN1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c60f734dd3e5d47facc08d6bd42543e55d5a032f2a31d22b370386198a0cba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMYMN1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc27ab6de445082ec1b3bc767bda4da76d96c30154372294b1049a658d0cd4d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6MZ1515699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cc7a1e8d15ef047fe2221ec3cd09f997c13171445ac68050f980300be7aa7c. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USJE61000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ea58c24d48941fb8ce04877253418a052c40cfb47f12f35f13f1162132a48c. 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/USJE61000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba612c0a8e06f91c9b1f8a48c6478a35b88e3be5a7615836299703ef42081f9e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USJE61000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986a882b6f77d469e9318ecd2e7614ab168a7f3dcb4443ef0e75a3f490e88c0c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USJE61000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bfbfb55d547cd759b65857efc415cd2f88af3ddaf7dc66b9c1b91a5c6c770f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USJE61000336.