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 0xd3249e61f7fda998ef5955b3f17d6d8b0526c477b2a5945740ea4ee41c1f62f8. 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/bc88cd43-dd88-47e8-abdd-e1b08909b22e.json and https://artists.proofprofile.net/proofs/artist/bc88cd43-dd88-47e8-abdd-e1b08909b22e.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 0x16af1ae257b5f45b8695efa7373f26348bb5e19f7cbb6d2267df84d01db8d631. 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/USCGH2475137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb105dfb4fea2f8557a9b04eeee69d3b9b2cb84c28bddf459213ff48ac665aa. 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/BK4DA2432995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe470cd5cf738ab53dee882f903af56529f264aa06bc8c8ef345658b371cc42c. 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/BK4DA2433011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520c9be96c82f4d20fa3530d1e017089ca49bcbe028b3f13506ce3eed851fc6c. 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/BK4DA2433012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13bfe4d4ea7a2e1efcc73f1a6a4e428f1e253447d4cbe804d3c9662bcc9fe92. 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/BK4DA2429105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e54484cc218d5fc994af762beaaeeab4519070fefb930442385326caf2afe0. 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/BK4DA2425201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a34ea8fb9f4c08bcb03b7f0bd145a63c3a5ef95d16eb5cbc431bcb80d84419d. 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/BK4DA2410740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cf240d37c15dad8597b1e736d7414b542edb9e8e6304d3fbe9f39240d66de7. 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/QZW9K2300651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6de5bd10b1ffca7957b3e55abfa181ff5061914073cbc3324b70056f3c27ba4. 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/BK4DA2324046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8588fc7510b191f998f2b5d96b62d1944e9f11502d5bcc2b24208708b6206ec. 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/BK4DA2324048.
llora (with El Toed & Diana Meril) - reinstrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20eff47f99fe997f37a7f565f33a36b6a61efff39085e9d504712bbe7fdc4a80. 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/BK4DA2324049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6263c980c9b1368f0b66bee64bb9ae1b4f1b042bd3a0b66fa633bb1cd487d. 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/BK4DA2324050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9f321917d1d772c68b343be1ba3f4096b4261cacacf73cbeb5d2d76985d99f. 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/BK4DA2324051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22a4b5e2020e97804fc8bda2c3e3df3d7095f07d677cae357e0eb180178941d. 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/BK4DA2324053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ebdd9039bcf5105fd475dedf6474d29e2af698f7ad36db1df45e02dbc94fa. 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/QZNWT2284422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6f3372ffae8cf5726a1b99107f4ab867401aef2b132abef31c1f769a3f5cf3. 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/BK4DA2429063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b839567c5a9e81c87f9d905377bc0c461919908ca618abe2056e27480644db. 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/BK4DA2429069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccaab993198c7ed90df5cfad72210bd661902eafffb3a16fc5cae7fae6f0169. 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/BK4DA2429101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524b0d761c1eb2da35110be3c30688ab557c800e862c8e674a1ec52ff78c9542. 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/BK4DA2429102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6656cb1e236e79409418366fb939d8f4a3a0925886f03b4aa13668bd0639c080. 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/BK4DA2429103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13bfe4d4ea7a2e1efcc73f1a6a4e428f1e253447d4cbe804d3c9662bcc9fe92. 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/BK4DA2429105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd4c34d103e5bc7528e845c105fad5c8750c839e1f7c7496b8c4638274701f6. 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/BK4DA2429106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf59f931a99169722142555b248b87b02203fd5735717c36326080a90f79d7d. 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/BK4DA2429104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e54484cc218d5fc994af762beaaeeab4519070fefb930442385326caf2afe0. 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/BK4DA2425201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ccdd1a28320cc6748e0ba822d8c33572d5953f653dd62ff8d81979fa56ae9d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:01Z), 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/BK4DA2425199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d26d8f07cf5b627d7aefe0796d82d04b0bda98be98d81b330b121186e7f578. 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/BK4DA2425200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4dd07297e16ceed94c1404f2cbd818604d2d3237092f4e0bc9bed65900105d. 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/BK4DA2308988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823b6ff21c5e45c32bf599e3f37c91797798bec29fe6e70aad34ed6da1b86db0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BK4DA2425202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f09182b62a3d1fd0f5e9aa5ca5cadd862d77769ee7f0a574dce961be9ff63b2. 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/BK4DA2411627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4ed67d85d226ce0dbc2bc0729a579a7b35f36c68b31f96cc480faacb01a432. 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/BK4DA2405286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6638c50705c3dca0f3a75f297f8bd08c8e39cd2c729f8047dacf8f241191fca. 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/BK4DA2425203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13441d734b4d49c75f5e9b21323cd286953be281ddb47e1532865894bf62104. 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/BK4DA2417527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bba1848a7331978e9cd4b6cd1307dde3290e028e06ae618159b56982c1f3ea9. 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/BK4DA2429108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ad4ba665b99847098c874efcc74ec2d4db7613ed82359b48ca189cb9225c35. 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/MXD782102510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed05efcb9c80bcbe3b63a2d2c98ad5a99b6c150c7630c0627b0847b94a108c15. 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/MXD782004998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01c060a49e9494ad4a204287941ac02eb9492ada2f150aa3462a8213751d15. 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/QZFZ62035235.