upright=1.35|thumb|King Kenneth II of Scotland (r. 971–995) Year 995 (CMXCV) was a common year starting on Tuesday of the Julian calendar. Events Europe King Eric VI (the Victorious) dies at Up
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 0xe6c2e7b1c2f03f07115dc79903b89ec37c3018ea13b3318d7a8d868cef9a0656. 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/501eb17b-43ac-4695-a734-91766654d357.json and https://artists.proofprofile.net/proofs/artist/501eb17b-43ac-4695-a734-91766654d357.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 0xa2b6eed52f51a244010e0803ed4a311fe710a0cc20530c02f892d344fc0ba658. 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/TCACB1486002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f309b609c800c94c391e2a966638d84bef2151d45580a07512ad7a468c5c74. 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/TCACB1490832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510ae2a300372bc337c2ee74f7ede5522f7f6ac7a965659c843d00bfd2b9abee. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:20Z), 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/TCACB1491024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000884853f9059ebe908d70f72fc6a48e4b0a0a86e4556b44405db13d675747b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:16Z), 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/TCACB1491129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab268e9b92f82323753100b577f46fc37166e5cf1a5b134bb1d136d7dd4a1cc0. 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/TCACB1495661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbadd58d032642a0e1455464a4fca4e2c2e8b1a0646c7581ba5f35b86eb1e43. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:44Z), 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/TCACB1495708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ce9832e9459db0ac55984611a1130005995819cf388b76889e227bd2fb106. 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/TCACD1522907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1f32776aa07244872dd1c61452e4fc77881cccab4bcc7b58322a8dca401c8c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCACD1522950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ebb6692b40a43f7e9ecb01dd113411fec69e0b852b2a6f494dac2c5dcb8f6d. 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/TCACD1522983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c44fe71d55c5479cd5b40293c511b268e3760223758db1a92d0c1dcd05cdd. 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/TCACD1522990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbec8d1898a8cd28cc4584ddeb19f0045dfc4c119565dd7a5dab10b992d6fbf2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCACD1522995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6932d64f1dc67f14105ac96cefdd85ad5952a964926378c3052fc512a7b148a4. 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/TCACD1523037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9ce4771d99938444250052f720ab74f3907cb2aaee9476e48ad5e4ad9642d4. 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/TCACD1523340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe074640f3e5fdb31adf6985bbe57c92d98a8592a23c45779046bea7e8ab870d0. 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/TCACD1523389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd160abe9e1b8edee3c63f4b52fada12c06cd6fcf9d6e1bfdf8d9125488328d26. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCACD1523397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468671400ddda81090ae141b4b82bed4f75c578b377591828b8e0c225896e962. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCACD1522894.
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 0xa505976ff2d7d768d3d7fab36dc53f27480c25c8b5f307b515258aa9a5800e0e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCACD1522952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ce8428c4b08569b47c4fc769776832d012733f59437885de0f52225100bf1c. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCACD1522979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fe381b9604cfde7666306edf00332205ff2d4c42c037340476da6b0334e50d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCACD1522994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566bac576fc2b2e08a81643b4e22645106578b0a4cce3e60516b9f367136c5dc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCACD1523366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d9863e749cab7b23295a957ff088f0938b1a30ec986e3350535f6b24bc28ce. 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/QZMZ92547165.