Fontes can refer to: Places France Fontès, a commune in the Hérault department Portugal Fontes (Abrantes), a civil parish in the municipality of Abrantes Fontes (Santa Marta de Penaguião), a civ
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 0xa06e6f1384286686d14759160e44243dbe8130fd82c9652592bdde5ac57e5245. 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/63cdc188-2a47-41ba-86d0-95361278a0e6.json and https://artists.proofprofile.net/proofs/artist/63cdc188-2a47-41ba-86d0-95361278a0e6.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 0xd98a25bae3e8e062e6da218292211f8edb1cf88f1ef470a6032e6c4bbb438d4f. 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/GBRKQ2321810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e8cce8a111d9fb093e4a566f6cc4b0e93e21b38834d08de70067cc8a9d205. 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/QZZEB2321124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f75b24cf90fa2ed9c111b59dcac152d17b699c33220d2b7f71879aee4f61c52. 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/QZZEB2321562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7567dc7df48d2345a47632a6e6d103f48ab710f6beddd3f6d4773148bc52d3b. 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/QZZEB2321567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab54e36037c6a26e70db5a7e8e3033e6528b376283c8116aa05d141b84ea1c99. 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/QZZEB2321571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc5ca26d7568fc3d48f3e12d40adad0b0b4cd18ba6bdfad1539260192022d16. 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/QZZEB2321581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d2ae9e6b360072baa8b61b84b1f2db30e110f3ac8e1759385713609080d1b5. 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/QZZEB2321670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5090d717541c3f904534707e5d517b5b32199f9ffa47ba8c392c114174e932ea. 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/QZZEB2321706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94714c88a60ab40102e502a5ded273f73578006692bb669dc9d2ae95daadd73. 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/QZZEB2321719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced560221cb1f0b6e9a9a1f0d2ce8041d22898c6803f0ad79147cfdce04e8f6. 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/QZZ8A2328504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e2fbe9230f2d44b85bf3fb1630904cfdf7397ad0c397ec34332eeea1255400. 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/QZWV32444364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46aefabb02727c1a9c2e02add20ec603753c75df0514a5738a792bd9aa69b39. 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/QZWV32444368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e905e02fdc314705dac67ba93c369d9db37761e96466b3b44ae3643257ae73. 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/QZWV32444386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f90c9463ce9ee015b03a7efaa82ee642f4ad3a8057539b18a3f20ddbdee5f2f. 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/QZWV32444408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9709843f9bbde36bff145382505855f6b8f8b74fb58e7e976c97f3ec109e39. 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/QZWV32444420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634281b106c9c8fca20048f32a42735ff3adf9aa36e055466770173c9de0a82c. 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/QZWV32444424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518baf6e70717e34590873e9714b3c58b630167fd8901620f296b6979daa480c. 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/QZWDE2412749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6e1e4aaa30b2906174f06fc410edab5ac834c8730f6b6e4dbd9083a4c7324. 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/QZWV32444439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91535568fa9d9b74456532284ab54696f3d3e0c2792475c7cb7de19345b405f. 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/QZWDD2488656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540d114f3c1e82b715cc9cb416afa9b9c005e7496a354ea091a1dbc26c6f157d. 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/BKEZ92300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bfcb49cd9b7574330566f89ed85a1d6ff6deedca9184013d179d8798197ff4. 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/BXIV82470090.