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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367f825237565943e892033852ff0b859b09e9ae5e6f937ffa1efd7495fada8a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81f0ad7e-d42b-441e-862d-948ac6f2396d.json and https://artists.proofprofile.net/proofs/artist/81f0ad7e-d42b-441e-862d-948ac6f2396d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d44889e7a8f176fea7c4cfadf8531c339b66626c858f75c5ab498be4d6eab4. 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/PT7ED1600294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad7307e1ccf8ffbdc5e7a756fdc25ce1270660dfab50f7880ccbf9aae029c88. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PT7ED1600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff784d87400a3ce4e99bc44fe859cc584ad37e427b38cf5165124962c3aee198. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:03:45Z), 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/PT7ED1600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5934337f250610d64245788dd8085d68605dfb74a0ef20d9a226131f2f5319d3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/PT7ED1600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae1790ab20f94b95294cb0264393ecc348488d0e0bd36cd6ddcc5ba21356f1. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/PT7ED1600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93311dee5d66b797a00913af007363b3c440a5c942104cade11e8e95fd1f812d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:12Z), 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/PT7ED1600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fc49a0b52b50ca9aa64384c4032ba4ac78353354b54893b0d63d9cd725db9d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:15Z), 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/PT7ED1700656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92ea882e9d5490c13c2f3fd73ac65ce7a75e0caba615ee209d986b2868527fb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PT7ED1700655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc4bbc814a9f8af10742a7a5cc0b2ce512f2ef0a7b68a0a28288ddfb8dfe9df. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:17:53Z), 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/PT7ED1700709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76be7308077a3b467571ad8c21d43d7b4596db474dadcd5de4d159ba5b6a756. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/PT7ED1700821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8769920a3107631797bff29606436772780ede549f204af250d1afabc0ad002a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PT7ED1700828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00e0fd1355e03076bdab44499e2cff6e5aa400b2ae4cdf24bb5aee16c02e415. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PT7ED1700919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8900f2cef1bab78e428788a5ced6d27d5f005b2102f7b2934a9377cc1db5b0d6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PT7ED1900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe23bbb6d630bf99488e8d8806b8d785663ec1bd9e55a3a1b497245930eeb16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PT7ED2000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f332c569edf52faaca8f6fbdcdebdfddddf2130c2672662fe7bf8165b55eac. 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/PT7ED2100441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d7a70c51cc7c4d2bb916a482e304d8567050ca6b50764839ed377d0e7d3d83. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PT7ED2300722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1978327daaba6b6af59b9310cda68902bc87a76d684cdb8792eb264d29d6b62a. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/PT7ED2400942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadb9757361d9b63aca3401b25a9358ec4f166e411ccb7a2dfea4a21e374cb16. 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/ES71G2426842.