thumb|Andrew Birrell (after Henry Fuseli), Caractacus at the Tribunal of Claudius at Rome (1792) A tribunal, generally, is any person or institution with authority to judge, adjudicate on, or determi
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 0xe3dc78772ea877af50bbaa7cd0fa696c26b1f8f8df2ed976ecdad76cb322b2b4. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6a4c0cc-b89f-4293-b2c0-7a09c5f067c6.json and https://artists.proofprofile.net/proofs/artist/f6a4c0cc-b89f-4293-b2c0-7a09c5f067c6.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 0xf65fe1d70d2b8bf675d513138efe043ee1fa4f0e06b537dc63a501fb6a3ecd3d. 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/USJE72316806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65fe1d70d2b8bf675d513138efe043ee1fa4f0e06b537dc63a501fb6a3ecd3d. 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/USJE72316806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef31ff0913941d13f572c400b1da3e627faa5fba91babf5f61491af3653ce526. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:55Z), 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/USJE72316801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff914be0d0bcd770ae714e1aeef210218474e383c97bc888abcce02530d5b0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJE72521107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff914be0d0bcd770ae714e1aeef210218474e383c97bc888abcce02530d5b0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJE72521107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6fbb214cbb41d33bac6f292dc883927c1ff622e5851cec9e2ec4f7e1939570. 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/USJE72521101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6fbb214cbb41d33bac6f292dc883927c1ff622e5851cec9e2ec4f7e1939570. 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/USJE72521101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c398ad96421fcb3fa0a1c6422633b8055a62f08ad1019bce34db9b0f1a4c101. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:32:21Z), 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/USJE72521104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff914be0d0bcd770ae714e1aeef210218474e383c97bc888abcce02530d5b0. 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/USJE72521107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64c89864bb2480cb5fadcaf25850f27f9c9576521652a4031651512d0bd32ba. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USJE72521109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6fbb214cbb41d33bac6f292dc883927c1ff622e5851cec9e2ec4f7e1939570. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:33:33Z), 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/USJE72521101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128b62cd3178d881347ee1936f51153419116c48c4e02ab16dd4a0a7e8c26eb3. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USJE72521102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74772776e8c46c8e6dd07171deec8052b08b042f50e4041b508b626ac57a591. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:11Z), 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/USJE72521103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c398ad96421fcb3fa0a1c6422633b8055a62f08ad1019bce34db9b0f1a4c101. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USJE72521104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85eec946503ca1930f72bb7b85fc5417a7f23d3d07bb128f28dcb23a1aabbb6. 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/USJE72521105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561100d501d1aaaf69c5a04932db09b439b7b0e84269f7e215e5ddb1de24cdf6. 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/USJE72521106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff914be0d0bcd770ae714e1aeef210218474e383c97bc888abcce02530d5b0. 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/USJE72521107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf524c13d5307e37adb41b88fb99f0025200feee474cec021cda0cafa4773bdb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USJE72521108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64c89864bb2480cb5fadcaf25850f27f9c9576521652a4031651512d0bd32ba. 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/USJE72521109.