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 0x34cabf4b688079b43ae1925f6ee57a20236e4e44d8037f66846a30edb7ab2777. 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/9001c51b-90fa-4f5c-8623-bef0d710260d.json and https://artists.proofprofile.net/proofs/artist/9001c51b-90fa-4f5c-8623-bef0d710260d.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 0xe9b5febaa29026e2143a932297666192c4604ceee83c100ac5bfb2e527e9b2ba. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZN882251490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea1b75a28bdbc5dd05a0f12407051158e2215815ff87885f483e81360e2fdeb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZN882252601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e85f9f786d79e997d15f5bc3ff0aeeb0803793f449c6320747b9108b89dabf3. 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/QZN882252603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf3e247ea1037a57d5e90d8f91983c032d537850a0fb2454a0b9ff2177592b. 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/QZN882252611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea1b75a28bdbc5dd05a0f12407051158e2215815ff87885f483e81360e2fdeb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZN882252601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1414f1fde0aab9d1ac467e4c73e52cca5e15a1b1cc420ffd00fa0cb5976f46f. 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/QZN882252610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea4e69fcfc9e3dc7546fc416afdb17f61799787ca8ed9e9047677008f24823. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZN882252581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75c28a90c9a928e938e9f552cdcab8219296eb531e880448e13a94040ab4a2d. 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/QZN882252584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cafd88868f3c2163353c1273b3c36f1ca6d651a039458aa3f1a4a3ac0d1e2eb. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZN882251487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b5febaa29026e2143a932297666192c4604ceee83c100ac5bfb2e527e9b2ba. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZN882251490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bb9ab4a826815e24a85e7f3096f916e386f82b1e119feb8f2f780820f16808. 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/QZN882251494.
Su Historia, Sus Éxitos y Su Gran Trabajo Musical
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb24ed7c981beefe7b0e81f4a41530a78f3ffca331a3123591d52ace659700. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZN882252701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe586e7cec0614f14ee137045b9893c763aaaf485f424e348539016adc4f4268a. 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/QZN882251507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c4f13cf2fc20ee7faa828cbd8cbde335681abd2190f900d52ca49790ffbcde. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZN882251509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cfd3aca4bbd56cfb675f2027fe0cf5cc5640955bdcb7d3a1ddd368c25fd8a4. 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/QZN882251521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84a7be73e0b73db60cef04f38b27ce7c052dc78fdc21ce51e5938cf389e22c. 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/QZN882252705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a0117fbae2fea4eb156f7f7cca5129e944c7d54597a2c652d32211dd03db7. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZN882251518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14d255ff5022d7084f5fc5873dd604dc14f48a3578e6f94b408533c57ca1d3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZN882251520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cfd3aca4bbd56cfb675f2027fe0cf5cc5640955bdcb7d3a1ddd368c25fd8a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZN882251521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04242fdd1e6935be6c69f570bec502f9d4d9bd9b7a06848f6f93ab38dbb6967. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QZN882251526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9f5f7ada591cddeffd458da559961ac43ae7f5bef4c2a58e72afdba8eca419. 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/QZN882251529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5e4899d4718dcfa8797f47e72bd73998cfcc53e3b2d969d38a4a9f6d0cb2ff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZN882251531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0517be74281d51a3a332c3658cca0f91307c0dfccb1bd056ed467eea807b6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZN882252497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04242fdd1e6935be6c69f570bec502f9d4d9bd9b7a06848f6f93ab38dbb6967. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZN882251526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbc125ca4f0474938820c1778f93a8f10b593b072f4b5c4eca2a777909fc73b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZN882252550.
Su Historia, Sus Éxitos y Su Gran Trabajo Musical, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a5fe133e5520b6f8d2464f4e8277a6d9b9fc9b1f7d82060f3163e64b80053d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZN882252488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f07c008e26d873f0ac1013cf6148a25a08b999008b97715605fd0722636d6. 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/QZN882252492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a5fe133e5520b6f8d2464f4e8277a6d9b9fc9b1f7d82060f3163e64b80053d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZN882252488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f07c008e26d873f0ac1013cf6148a25a08b999008b97715605fd0722636d6. 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/QZN882252492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93320569c959c9c27d42272de9281005a68bc8230570001d7afbaca57fc26975. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZN882251458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93320569c959c9c27d42272de9281005a68bc8230570001d7afbaca57fc26975. 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/QZN882251458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8db4e97c4da161e408e51bad15539e7cf88b121aeed9c7468a43ac095c8390. 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/FR96X1945098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184c3fe785af04fd9c086d1db8ab5e8071193c93b08e1b18b4d049f929c04a5e. 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/QZN882251444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184c3fe785af04fd9c086d1db8ab5e8071193c93b08e1b18b4d049f929c04a5e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882251444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f3229b95e82e920527da3b89eff703bce729e77d6115bedb7527baee544512. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZN882251446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5500582fda66ac2b346540dcb651839818d2433719d796cc6854cfa931660. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ESA012259528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5500582fda66ac2b346540dcb651839818d2433719d796cc6854cfa931660. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ESA012259528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd573b3c9a2f4e685c763f6982e91f091d74d737540f5717ef9e941140e13166. 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/NL8RL2460156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd573b3c9a2f4e685c763f6982e91f091d74d737540f5717ef9e941140e13166. 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/NL8RL2460156.