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 0xbae8ce8ef982a78ab5cb7341692159fe0949d57eb6d67a2e4b6de178b4dbb44a. 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/7c1f890f-2e17-473f-884b-635959b13b20.json and https://artists.proofprofile.net/proofs/artist/7c1f890f-2e17-473f-884b-635959b13b20.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 0x3fba526ac74615de8f77ec70ebce427d066199e5a96b9bac8b474032a597eb1d. 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/QZS642202800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0345088751deef9d5fe43ba851a771a12b30e00d20c7c2381ffa107a855547. 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/SE6XX2224865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f55f8e77bf71548f902e8696ed95137269e519dbdd71ebdccf0bb708e293b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/SE6XY2289055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37598556f88e03f5eb038a86a10923b2a72500818150cfd5bf4b0983e68cb9b. 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/SE6XY2297091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0167c9e94ce5c2d03808ac3c85bbc83b64fc0e3f7a300c8c783e68156aa59a2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SE66N2205018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c33f1ce84575c7f82f2342a58bc0f0c1818f938181b5dfbded04e670a6a22dd. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/SE66N2205203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e5dc7bb7badb5378415879a68c69863734e89a7914d3a2a635814668c7e541. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE5BU2209656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaace9fc633e7e1958b0d9e8f3a83be723fe7238294293a0d76ff0fb133adbb38. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5BU2367025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa492faf9eeee30d8d55a0e50f1eee7f19052bff9ac8f475c2e105b0be144fd5c. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/SE5752369047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb065ab156acc1caab8f3078ae94d4326ae18adfdff1e800db561f5844507bf09. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE5752370955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4867f9626c9f2b61cfda8bca5a16a935df0d883eb94967cc40d43e99a2822dd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SE6QE2320246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e74529efb61ef0b001861d512cc412ecd20f500226629cd198effcdfc066386. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SE6SA2362395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab46ec279748105accb5720dde21ec170c647c94690cccf06e1bb4035fc2a31. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SE6SA2377199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9dfef2b2cfc1472df4d1a19dc4baf1e189dc9b18d7a2b8e6c0ad2eb7b87383. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE6TI2305597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f5102c4160b606576582a93f5d99eec2e3acc5e6cdb0a591b94768a944d6a7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SE6SA2326602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba10a268974e0f7e93036b9729182fab453a5f0cbbe21492ea75727bb32f4ae. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/SE6QE2391203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cb672b3f90b07932e5718805b83fdc1026c5eb0fb834b03becd04ef4e5df75. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6XY2324642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea882128cf8c60b292184e33827abab645df4caeca2fb0412f8648dd2c40b7. 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/SE66N2319259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ea2127ebdad0e1e5e1aa4c59f358be02beaf09120877cb3987b0316944000. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SE5BU2415426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0817c1f94cbbab133930b15963c2d6478aecc0061cab3af9464b4816e5e21b74. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SE5752402698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92a7fe3e896ceaa07f55e52cd9dd5afdf6546422022b6053df8b7441f7c8428. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/SE6SA2449526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e91571378eab365d476d63502ba61540d17cc4a4f4efd9381c9a3461d9ac6. 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/QZZ7Q2447968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b873ebfd2e2dbe0ae82174a22e1588198b7882e52d7a561a9bfc319a86755d2. 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/QZZ7Q2447969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf03316ab93fface516bdcc20884c6ba7fe1064c21327b85934e6a3755177417. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZZ7Q2447971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16269c5363ee9e657e2cafbeee8b85170cd8f47471faab98ca5ca5d209e69a11. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZZ7Q2447972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c699e17600773f75ce16367872e42b9f7a619311c87f87bef3509c54e4cc31e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SE6SA2483231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe18f0be7721c503fdd2836f0ebe69baec796f9e66b00bb40948065ce3c46f7. 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/QZMHM2535166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a3ff5ad6d9d156ec4886f66bb7d45874195a9e59897438c8b449a041ad58de. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMHM2580248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7656907a121bc692f3bd40dec7a6f4c2673983ad46c3600a6cde318d38a829. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM42K2524750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b5463d7bd75962b89c07188a0c0ec7362140d7d67280c3d1263b9a85d57f5b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZMHP2527804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b62a0a7af5e62d57b6eac09806cae4257d30066d8a49bad3b5a242737f04ceb. 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/QZMHL2518274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718924787f26a5c0412b6640b22a3b61aa2ec2a23e72fd67431db4806cf0f7b3. 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/QZMHM2587623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad71d44cfd176a01c96f0a159c032fc455697bb75b7fcb18717b3a076e4d4bca. 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/QM42K2554020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd577f5e76615df6263b04ff0d8cb6660e5333d279f15985ffda9daf7221d6726. 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/QZMHM2537378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec84c21a658dd4edc8d82b9cea52ec747927a4bd8215b1ca46528d87e9a10195. 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/QZMHK2542850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cb1b34df14679c9b499f05ae65f1b8fccb14c9bc85c6827773e62baed4936. 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/QZHNB2582243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cbdb3d8d82b3b9d407227318ae1d8b3af78ddc37ea0f46e49f342e4d2dd34a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNB2595214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeb29b3d812f2b080669d907ec23c4c149cac7fe5182e4952402d5c21f2867f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHNB2595215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a6e423762039414239cb1cef8a9f8d819423e4b8334f555cb0cb48a96a12d1. 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/QT4K42587374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8ed3c88de5b538cd9dcdd35e259a14642bcd7ef0b44c355c2a7cf956afef5b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QT4K42587375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28d7a204bc328585818477590927c17ba23ee3279197ead4470430eb02b6530. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT4K42587376.