thumb|A wall-mounted memorial to Mary Carpenter in Bristol Cathedral. thumb|Lightbox used as a memorial. A memorial is an object or place which serves as a focus for the memory or the commemoration
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 0x7b7cbda22a3bc5380814f89cb1cccfa29768401b97319cd02a9b83844972f045. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9060d507-8168-4ef8-9920-0620f538ff19.json and https://artists.proofprofile.net/proofs/artist/9060d507-8168-4ef8-9920-0620f538ff19.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 0xdfc84063ba2ddb9af5b7c822a7a566a3d7331b825eada7ec487098a48da72cbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f0e0056755b902485f44654c197957c95480db1f4d15e949488f012f32663. 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/GB6TW2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97c3ed130a85f9e4033d61b5f4ad11ead141b628d9f6cf0cb57540d759837fc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbdcac6341751fd83462485065adf798e7116f23f160267d3645d21896e9fea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd058406dd740ab6fbfda1b8b23c9e67986d865342d08767afd7da0e2ae98fcc8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1ea1051bc2eaee88b2fb2062acb4ff6a46a8970f1c3a2a0e9fe88eec41011d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GB6TW2300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba971f9513887a93f5854019f97da77569742107f28c14e8e49775c89c801dc. 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/GB6TW2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58188f47e349bd140ec9e72c58583e2d8d8cb7b2d67ed937992b043da6aa85a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dbab6d3edaef2cec4d3e6d5e311096a9db61177e4878bec22455639eab6381. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7170d83a3e25d1c9980e4f6350377fa8eb2c89533db564411659c9c09019249. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecd5f093dc5662a411484cc30684f894600a5f2c72faacc992c44c6f14dfb2c. 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/GB6TW2000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d16b5f5b850631aebea07630e6e65fa5c6d4fb7bd0dba96045e5cf90f8fbd. 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/GB6TW2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdefa2ab8337468f72de99f0471d0c7feebf75c29332bd023b5601af54148e9a. 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/GB6TW2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdacc25621047f61e40e6f2c62c35e2ea33b914d5806070e832a8d0201831b9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB6TW2000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef6b9f0d4d4da644d1b3b16dcbec70cf24aba059f32e23f1d5a1c2bbef6ea90. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB6TW2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ab1598e91c5dd22b44ed7270f6c3dbde6646228bec1c7fb8be0dbd5a18c2a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d638bade9c227ded9d5c497827454ea17bf093c4b257d6824f3c0a77c350bec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB6TW2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7a702614466a95fb282493556449dd14aff08f94fef2ed11ea9d8d09e36f78. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB6TW2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58188f47e349bd140ec9e72c58583e2d8d8cb7b2d67ed937992b043da6aa85a8. 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/GB6TW2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba971f9513887a93f5854019f97da77569742107f28c14e8e49775c89c801dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f0e0056755b902485f44654c197957c95480db1f4d15e949488f012f32663. 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/GB6TW2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecd5f093dc5662a411484cc30684f894600a5f2c72faacc992c44c6f14dfb2c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB6TW2000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d16b5f5b850631aebea07630e6e65fa5c6d4fb7bd0dba96045e5cf90f8fbd. 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/GB6TW2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d16b5f5b850631aebea07630e6e65fa5c6d4fb7bd0dba96045e5cf90f8fbd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB6TW2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad1b404a8d21ed46c42f288746a254b6962e72bff5eceb8470e28e58d5033f3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB6TW2100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aaed8da0d9d58c68a9305ec47b26bd15f410dca55fd02e3f9fbacd544d68b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6TW2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b5ef26695772c4e064957e3b1c4b5d38ca4023fbbd3eab79275f88c48cf083. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB6TW2100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7170d83a3e25d1c9980e4f6350377fa8eb2c89533db564411659c9c09019249. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB6TW2000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300e408cbc33b6412779b50fe92e1782e6a9093947e6484f199eae868c9f24e. 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/GX5J22100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc8811816a180453f08de87f4f50451d95bae97c5471fe35edabf6c59849aba. 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/QZNWR2275232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fadd7a2c9da7b73331d78e0074d41bdf0ed9dc8f92287ff236f4ab4743eda1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872273497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a038b51c1e80da5bb12dfd737fb8dda1bdda6c82c62ae13806e0b77356c1ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ7GS1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3463e67a01057d5e2bcaab147de759090c93b11e0c9738e8e3ca671a289787. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWZ2168392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7323a9a14dc45cf2c1833d529a2c86a808e0e47cf690fff90f0773afd5b83b8a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282226599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e2edf5695f0b50185b78032438f98af3679a1015a8d832a1a82f5013209b7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX5J22100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1fa2f905c88c3ceaa848ccc26962941b24f17501df13f226f4de611d6bbdf9. 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/QZFZ42233165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feb5487c511d5d195484713ae03bf806d00e8d020bc6ffbecc4b9d534af1295. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAT2290281.
New Indie Folk; February 2022 (Indie Folk Central)