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 0x54e0ae709784c17a5fb70cf321d8ca1e284273eec4fda89d88c7e7062950b4f9. 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/c4ac68e1-3f4e-4790-ae25-fc49bcae9ac4.json and https://artists.proofprofile.net/proofs/artist/c4ac68e1-3f4e-4790-ae25-fc49bcae9ac4.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 0xd011fdbcdac03cf78a1d3998842c4e0d9f4de9bd93f46996b9ea4846dcd115b9. 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/DKAZ71919002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a55cbb4c73bd781112e241e73dde0d81a88a71f47ff3687d1187d14569aadfc. 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/US83Z2025659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f64c08480f14616bdef44afa8e90169af4a2cbb38953e3a3f3daff719f09a7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US83Z2025664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c9efc8562735f3e8f49a010dd91cdcf2991575297b4d0772b2857657f17107. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US83Z2144348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265ddae14b57d953bbc311b3ddbf211a4bfc3ae066af558e523b32d33f21879. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US83Z2144702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103904dfa7e43d1e9cb5d231a97dee7f4e428ff62674451624131deec424b7ef. 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/US83Z2201735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea632ed6782c6fc19cc51e37898f83dbf162584e7e2c2fef4f007fba2bdebf7. 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/USLZJ2339198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba25905102613e7ee27491a6ca2227a9bf9d7b0b351cb2af10a355a8ae0d2186. 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/GBKQU2367346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8efc5c474ff7598088a1b842ddae93001d6ef6692d7f4808a2f4303032f0b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:23:45Z), 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/US83Z2352151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74e43fc689d4a1a37d8d8592102d208b07fbe59c45de4964d23787c90117e41. 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/QZTV32456655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408f530770dcc16841ce30f43b6543e8174ca8ed3780b0aeb59efedf37905951. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/US83Z2507636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5b2505792bb4ac330fa2c26c47e7ae57f6de6ae45347be1b5cc808679dc6fa. 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/US83Z2512925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff3cf6c1b06ae6f9f9357e759f7698e232aa70abbf3b9ad8dd7c57469c5f7f5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US83Z2510682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fee7188b07e50e39de31a1478656f29715158851883d0258e3be76d3c72b0e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:51:02Z), 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/US83Z2514446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b1fc09ad13b23317aa902e68f6f905dd9b1f5123b1d1842d48a5cfc8b4cfc7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US83Z2514449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787707868ef5214cac0eb37cffaefaf513a1e4382971a8f7faca5504093fe557. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/US83Z2528523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74e43fc689d4a1a37d8d8592102d208b07fbe59c45de4964d23787c90117e41. 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/QZTV32456655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb16f5ab202b220e0dd7e6f13906aa68a973418af4b343f3d39ef92a5310ab2d. 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/FR85U2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7fab75a08dbaa2035fc2707732e94ae8308f0cf0f5e2040132ea082c21e18e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US83Z2042929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea632ed6782c6fc19cc51e37898f83dbf162584e7e2c2fef4f007fba2bdebf7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USLZJ2339198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795f0e3caeb18dff4f22bde381708c19fec5da2cbdb6e8717a53d4f547b4ea7c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR1980179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61bbe1fabd4ac2ebcd20944080316c144356f137ac7a28a84b6a1ce7951946. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR1980180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af06f408f7256f34988bcb24797d9401b3e7e566fa123ad58347ad3283e213. 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/US83Z1820942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803dada49eb7724b99936c29e06ba9a1e92ea8d83ba2a8ac3126043212f79359. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/US83Z2149324.