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 0xc42226c2c252d102e051414df008e913bc97555761c43f8c23c9fe66221d3442. 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/646a80b7-1c1e-4b49-99ec-689c0ff7496b.json and https://artists.proofprofile.net/proofs/artist/646a80b7-1c1e-4b49-99ec-689c0ff7496b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hinos Ccb Violino e Piano Clássico (Instrumental)
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 0x4a4aad7fbd5b04785bfe3f21c17f44fa549ed1af116e7aa027a19b9a1ecb4bae. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZW9N2224395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b93cdec5a584c1841cb8bd047f1ce20e0361d84908f45e62de5a99998a43f5. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZ5AB2435802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc6c7858648acfd8eb71fc6ab1bbe31939cf9dcca12ae7f6fe231053ee953f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ5AB2435803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dec3d14bd52eac30a00c6ffdff08ed5fa23865e8a6eb32b6866e7877f58be0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZ5AB2435804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5addb5d6304bf1184a5cb87112681f3a5af8e2cd8c4fd9adc9183c66d5289c67. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZ5AB2435805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e19a808cc784445e7b9d652a7492f60450b95301a7445206cfb699bfe6c5cea. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:02Z), 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/QZ5AB2435806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce57bfa9cd1d352ac3a62e73fdddeb34ce2dad9c92aee7ad9a1c1c0a0204ea9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZ5AB2435807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f04f76c82b99859cb0061335fb896adc57d907cc47a12c6c48843f234c536e. 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/QZ5AB2435808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687479da5b0bd8d4c7b2810259ea14ee4e39d2def5f50aea01547e4677f54a32. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZ5AB2435809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ab2756e45240120760236752f461227191b8be9edaefe9826b2c81fb031e76. 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/QZ5AB2442993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d68a87cb2736b752287fdad5374ee6d1d2650c1bff058121e8615d2dbbfdc0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ5AB2442995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b028825291f7b3ba9cd6dc1f8c694cbfa3f5a297df35959ca50ceb969e64d0d. 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/QZW9K2470826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33609bfc97d27659757a56632da8f1bd447fcec0a8e9839bc2627f1106ac7c8d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:32Z), 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/QZGLS2538072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6913ae4044ef721972bdf64ef6f772c3c8558e85f8b57655cfc6760ee897e5bb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:53:27Z), 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/QZNJZ2574134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ce006c1fc8848b1194f83018e81d20289043ea78e9b15bfc1c80b1961ee28b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:09:33Z), 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/QZTPX2584429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f03e7bc7eee5a44705f4ff43e597ec4f1f0f1146f74967ae66a4d87afb8c0e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:17Z), 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/QZTPX2584430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1b093840988d2d6dc3c9b87ad64603fa6dd46f0832aa232139933acbf45939. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:56Z), 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/QZTPX2584431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683cecfaee740896dec2153cd5e6fb4fe0688cf62782488fe1d459fd3e8d9756. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTPX2584432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759ef6a362b7080cbb1a0af63a32811e5f34095ea52fe3ecff1908118c650405. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:34:53Z), 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/QZTPX2584433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3af9df73b6c0440f9a7968b7023d0887fad065eac92601b4e259e1a38eb37e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTPX2584434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7821d916ce248a3d49e89c9225996b78436a90cbad876433b29722fbd55b8fa0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTPX2584435.