is a traditional medicine practice in Southern Africa as far north as Lake Tanganyika. Name thumb|right|Stem of Margaritaria discoidea at Ilanda Wilds, South Africa, showing old scar from bark remov
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 0x9dc0c49975431a9b236564251ec6b3fbb7b156012d0f1545000492371b0f3b15. 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/71e42548-bc47-429b-84ae-f661f2f35001.json and https://artists.proofprofile.net/proofs/artist/71e42548-bc47-429b-84ae-f661f2f35001.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 0x19efaf0ec80bd3e326a77f46d5ccc1063686c71cb94b45afa55e7bb5f8d2620b. 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/QZMZ92307982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a1a8d5c32644e3e18b24b48bc46432abad5d7dd742521850e1784ead6afdcb. 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/QZMZ92307983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d1b7ed9461dbcc440dccfac5eb48f0bd284f03eb26906de56090e8333cf1ae. 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/QZMZ92307984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5268a9adb63326f01d20cc517f8de7f5fd611f3c19f451ead4c1948f346cccf3. 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/QZW9N2202402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84a1e525e918da8b28e63abc32889af7ebcad5accae358676d8b609bd8c122f. 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/QZMZ92307985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784d151a46b1fb94f24c1366f1dd7d876995362f19f75bb2b63e3ee71bd48016. 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/QZMZ92307986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd55f8c6f5aba80e9c5a67ef7920bb5b21ecbc38c765235e23299a333f6c01a. 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/QZMZ92307987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73845751b1952a10410010a8d6e2a2c059773f009a3222d8cef76eeb2e752b04. 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/QZMZ92307988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44190f1f599b5b886885f1cd5823d8118632cbb286ee7eec54fe22619ade4fb0. 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/QZMZ92307989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710842fbaf0a78887b19c0660c8e269b0569e3e3262c0e2696d2cdfbc34c1227. 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/QZW9L2201349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43960b3b4b8dd1eb909d2d799d383836f9bf98e50b482731c6125978ee80af8b. 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/QZGLM2338717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33266adc8facd8d89f7ac24bfcc342792ab41401a7e5ab6cd60563e1c04ffa0e. 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/QZMZ92307990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd7190c6e9557ab63c7762c4cdccb9b4ee92d14dc1fe8e9202d5bf59e304ff7. 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/QZMZ92465408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a8c9ae925fd812ac16d7ce0e38fa434f8c9741673654a2fe0dff8d08eeb46. 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/QZ5AB2439350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441391d04169dbd391fd366b2903c15a1ddad73df3df75369497abb56e0ae92e. 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/TRCGH2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e7d7060c51463be8cd4e67c7492a35cc4d9d4757a459be9fd424121fd90026. 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/QZTVM2304688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12833092f3593948fbc0fe11c71768e46de294b3d72782cbacc31caa61193b6a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2304689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ab6d1464b1656b4c2175ed63ae4f48448cae0aeb9af9d37c704f2ab4e1960. 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/QZNJY2356912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac166478c744cf8f32cbcdd28206f982b1e5f9e68bba70576476ac02be2a56. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRUM72200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ef808f3a5d1b91eed22511d00a027631f340b053457426cf12f1c991e7dca4. 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/QZN882234285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0c65226c532eeb7108cb657892f1a0c7dfb417b277810bf15a5f7bcb7f9af0. 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/QZN882217471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b3aa4b2486280c006c1338eab1b77c05ab85b751306d41bf6ecf8935a5cb16. 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/FRX282141975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f828eebd9c596e7fe0f5f15736d6c5ef8dadd005fb6a46cdd8e529d751e85ff. 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/FRX762095046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bb834eae4b71aba51fbb44ee44b6cba2db611d4f9a60defabadc37bf56c8ed. 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/FRX202040345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec2c680392f031bd0eae457b439d997027e1beb8d9a992ebbd3ff66092c913. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX202040346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda5c30a8591f73c3bf3b215b105278faaec87a81f7e3fe9e0edc80278f7388a. 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/FRX202040347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee7637d1eaa715d3d26ac4962488961c5d56f607ff70f78b29541fcabbe232. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:41:38Z), 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/FRX202040348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63473dbe1d458c666a6a64a60e4103193f53224376e17f2d148000679a3c2ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX202040349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fb54907a8bd8e898bf5f7b66315bd1e94b6b58585772d82081d58b7bd5c3be. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX202040350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5813f4bc1a7f1d7e5ac3efd41f5645b60d61f5f2a4878869f6cd370a6f33be0. 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/FR2X42062521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fc2deb7c0892ba5e4d71cee59343d19c013a7c5c44799e5ebeb6262a4e859b. 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/FRX201943625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c36006ee6511daf41221be1ac5cf7cb131e05509992fd3020a2a4e9bb7860c. 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/FR96X1949120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c24bcb4f5a735e1b921301831640f11dcada3cae910b5d64bf9aebe0e20447. 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/FR2X41999874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a110ee35209ddb18ac336622de9a0c2bdf3a91e321daa045f320a9ec4b7900. 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/TRAKF1611767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d25fa3d29b0336678abd84fabf407ad75c4508f960b67188e02bdea9279c5a1. 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/TRAKF1611426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3a52412433df087a0eb27dd0230429274f664772f4759d78c258023cfcb63. 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/TRAKF1611094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903dbba92d82cbb82313a8072845900ef86ba314abe764386d04cabc2b5fd30f. 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/TRAKF1610890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf72048b4e582650768a8e2a199bec8d8fe0bc72378b29b5fa30dcd10b540425. 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/TRAKF1610603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c308aa1ff7c3e94c6af8131cb66c55abdf3413a55250052598cb3b9744ad04. 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/QZTPX2361588.