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 0xb272b479e85128f79af8b6d2586537210882f7fb83e41ae3d33346a983ad433b. 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/9feb2e5d-0049-4a3b-8ff7-cabd8ed9d545.json and https://artists.proofprofile.net/proofs/artist/9feb2e5d-0049-4a3b-8ff7-cabd8ed9d545.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 0xdce378daea788ddc45b1b14a19a51712372b1adeaecf1599b04d2b2df79a4d53. 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/FR12Q0400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf4a8e83cb168dacafa51744cf58ea7ae47707e755628d6dcf918f9f56749d6. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/FR12Q0400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe985c61c4ae54ba4c1691fe02028fc6fca0df83c0d49b1aeadadb703a26c5de6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR12Q0400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae92b31738c448e193cbe83b1881885c9a7e47ed7bc3afbd36dc869ea6b15b8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR12Q0400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe985c61c4ae54ba4c1691fe02028fc6fca0df83c0d49b1aeadadb703a26c5de6. 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/FR12Q0400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae92b31738c448e193cbe83b1881885c9a7e47ed7bc3afbd36dc869ea6b15b8. 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/FR12Q0400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a924f61bd2eab1a06fb7b01c3e6973a455029c8e5028aed48a19a8eac41ef7d. 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/FR12Q0500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4a65c8db73fafb13ebd2f9cb5dda56e26aac733e305e98f54a67d1cec75006. 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/ITC700600268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe119ff51c88325e3ab33b971d5a646576a17d891088441639b2da07e17d39389. 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/FR12Q0700279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0ff760eb6f33b6736a4e789d8a52af6cf86bfc16270f4971d6ad4e1f645e3. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/FR12Q0700281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2d69d0bba714fb65305012f53d5c413e11efd6451431dfb96ab616955e842. 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/FR12Q0800328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67121147375ff7de3c15439f88e81ce4b33595e8f8daadd99ac638788a1f9d. 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/FR12Q0800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801fc3293a5ab7f06275580de0b94870955f03f18bc0f62b38e1f7f6cb0f9e42. 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/FR12Q0800330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff997a51d41ddb99a6df5e023833b367b7c1c53b73e2c862d5f57a3e1a2f1e57. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR12Q0500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0ff760eb6f33b6736a4e789d8a52af6cf86bfc16270f4971d6ad4e1f645e3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR12Q0700281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb62792b2e41a578c7034acc388716ac6e03b796255fba209ffe24c96021462. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FR12Q0400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e1716e0d27966466316573cab3990f85d281225b0081cd8edf02c73b32700b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FR12Q0500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe985c61c4ae54ba4c1691fe02028fc6fca0df83c0d49b1aeadadb703a26c5de6. 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/FR12Q0400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a924f61bd2eab1a06fb7b01c3e6973a455029c8e5028aed48a19a8eac41ef7d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR12Q0500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2d69d0bba714fb65305012f53d5c413e11efd6451431dfb96ab616955e842. 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/FR12Q0800328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fc46e10192c7811d295c5bd53c4d7d017b7dee7c97681c0fb31acf4e66abdb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IT0361000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67121147375ff7de3c15439f88e81ce4b33595e8f8daadd99ac638788a1f9d. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/FR12Q0800340.
Girotondo De Andre' (Live 2021 at Museo Piaggio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46352aa7275433c2ad5a6d496da4b5f5e820d90dcd07d1f3aea6eb2423397718. 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/ITV702527401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce378daea788ddc45b1b14a19a51712372b1adeaecf1599b04d2b2df79a4d53. 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/FR12Q0400153.
Heroes Expanded (A Tribute to David Bowie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c691f1f614c04c6cb8d1a17ca25eb47e398be521aa9b8c8c2172a50a7363d37. 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/ITZ682100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3127cb395577f3052fde7b9c3ff189475090dacafda9e6905963c32fd70e64. 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/ITZ682100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1226aa1334bb04e8123994a4db2c369c3fd74dfcc9718f35bab54ddfed62042. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/ITZ682100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ccc7c58187d57cc429dda5e1a71ce78af396475613299805038e1a2c71d528. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITZ682100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad87e6c55337198391872d072aa3be30da7ec191ad99c0d25dc3bec2b7a57c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ITZ682100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fdca419363bea6119f360a83c180e81d714ac06cabc6c3f1cdc4e14a416096. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITZ682100306.
Space Oddity (Ragazzo Solo, Ragazza Sola)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74192b979cce98d3b7e7fa4ee3e79c150b12891c0f74031d40699f01e59b11b3. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ITZ682100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8359ae9df967c5538be32022f4f175c6d4e40c581f9c8982fd47e583a01a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITZ682100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750740cb73a1201b1fc05cc7b41e102e6c89c0f762308c972dce557d234930f2. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ITZ682100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ccc7c58187d57cc429dda5e1a71ce78af396475613299805038e1a2c71d528. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITZ682100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1226aa1334bb04e8123994a4db2c369c3fd74dfcc9718f35bab54ddfed62042. 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/ITZ682100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad87e6c55337198391872d072aa3be30da7ec191ad99c0d25dc3bec2b7a57c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ITZ682100305.