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 0x9886ace7466af552000d3be73abd38c8a249a6bb501556158cf3ebe9a7c7d759. 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/c1e4a061-8ccc-487a-bd4d-4ca124e96694.json and https://artists.proofprofile.net/proofs/artist/c1e4a061-8ccc-487a-bd4d-4ca124e96694.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 0xa37a919d5644be5b75268defbd1c90767b104e2c568b5ccabd4ee14d44d8afad. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USHM91148607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9255e0c00b457ee3db3c104cd16c9b230805d6995a88da14f86c91cee6d18225. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US7VG1976849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee5f92698793d16d5ff707ca5f8937c4649b9331fd9e47f7c06313db75d4cf2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM3DF2131554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b3ba41dc4964609db7c479aaa36d42ac333d3c6769bd6197296b8f2334ffdc. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QM3DF2136560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c25fe782e8824ca18d89033d380434b076317ba31e1acac1e0ef68c6560355. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QM3DF2136563.
Homenaje Grupo Karicia: No se puede amar a dos - Si te alejas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfd900ee4f6d8af32c8ee26e2f87d8e07fb04d650affc62c5242cd705d90223. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZMZ92479255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538d471abdd690fc0f355a1ee9bd66300b0bb7f96b74e32d780ef514711c3e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJX2485211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc642ba9e5a2836fbd351768980068dc3022cdbd702f813f5d5feffbd338eabf. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZMZ92584575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cfdc432643390fe8557e2c6f9f379f7e2ba9d0ebb2bc48125ca5d79ed9f67b. 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/QM3DF2121771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8636d6e5b762d09675b87122313b30b21a315f63487ca9a73e087f8f9d20d752. 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/QM3DF2136557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc727756127636bbaa740349169599020d1929b1a84dd4654108059e7b227ed6f. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QM3DF2136559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b3ba41dc4964609db7c479aaa36d42ac333d3c6769bd6197296b8f2334ffdc. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM3DF2136560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee5f92698793d16d5ff707ca5f8937c4649b9331fd9e47f7c06313db75d4cf2. 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/QM3DF2131554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c25fe782e8824ca18d89033d380434b076317ba31e1acac1e0ef68c6560355. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM3DF2136563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e939e9516e6352d2cdfe78b4b6dca267f7d17be6203fee2eae909f2a45e0f1e. 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/US7VG2233829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7eec6ad065ec0deb8a162df318171240cf6193e9e74ce9e35d076058f08a8. 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/QZGLS2562880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e8cc50a96f0f84546688e46d075823d912531feab6cd0969b4781114ce4e65. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNJY2004470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb096b122400291851a7e97e9c6ba29c6d2bdc4d8cc11983af72c23f40b1fbf3. 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/QZHZ32255231.