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 0x1183d5ad064c7066497477e8ee1394c073db908e0610dadd01773b1aa3c38929. 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/c42198f4-07e4-4dfb-91d9-3a94b7d4ceba.json and https://artists.proofprofile.net/proofs/artist/c42198f4-07e4-4dfb-91d9-3a94b7d4ceba.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 0x52d37a023d805d0c289d80e2268d608aeab618d74f16f2784d04051c464dc364. 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/USLZJ2328603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50908b1bccd280065f4b8da74e7b8ffe4746ff19a7a2ae2253167fefeeffed9d. 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/USLZJ2328604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eea3701e45ab780b9ddc63425c58e450a82f423eaa7c343ebcd5891c187a13. 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/USLZJ2328605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76eb353b91f439245d83fee3c3824f40ad3671cd2ec125636b229e7c392bde. 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/USLZJ2328606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fa3443e6a53e580f8f4180cc77fce5c8c095589ccb20d38bc3f683bd37be6b. 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/USLZJ2328608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d99e162cf13fa7015a8469c90f7d35ab8509d20171feee68546f56897b08f11. 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/USLZJ2328609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd786eaa44038ca8de6f4daf24f9ca3a96c18a825cf433795043f9abcc784374. 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/USLZJ2328610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c9ac90af7f5b74219f704d81846554a9335a76c9586c42a80517c160c76667. 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/QZDA42348113.
Our Home Our Land (From Collision Course)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88b25740b18a6dbddafb246af49d41f61464bd3d196066e3aacd79daff13310. 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/QZNWV2220446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfde44c8e95d17087d8a63a182d83b4bb176ab53cd6be9d5142828bbcf9e0e1. 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/QZFYZ2087103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f020d96cad4b2329396cb7afb72f3267c926d6e0b2552813f302b0cc0ed1f27. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:39Z), 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/QZFZ71985380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3667db49501680e334bc294fc4f131267d057221814ebc6ceb616438a18699. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZHN62011835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9234e50bdddf6948bbe2395dc9f873d68f0a49597a1fff2305265ee7b7cd6b83. 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/QZHN62011836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb4e1462b1e656ef81fd12d7b946f092456908370a6575ca2c9a64d3d6c960. 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/QZHN62011837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fb02af39343a2371a82f846b824608b56c0ff7504c793ed319611553c68e8f. 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/QZHN62011838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485982e23843940a2e4839cfd39089f3a2fcf9009e4509a3081a78a44b1d67a3. 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/QZS7J2119454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d528e8d258878ca3427c0ff62b343c9d5af9e53425e62eeb6e813f675cdebee. 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/USUM72221740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3832c2a11b8b2317448ea4ff8e0c864259ca14ea38fa9845e8e73e6c2b249e. 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/USUM72222071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406c0daae63c66a5704dfed7df5d4e89c77ffe8159ce27f23f93592f8daf652d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USUM72222076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8664717ccf99acb7fb9bdf01a4b6c9c96bd18059ed99fc6aa8764a882718cc0. 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/USUM72222078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a46744349dddda27e8eccb73545489fa763dca370cf81bc7afc9ea3b10852. 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/USUM72222075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af51fa6346bb59dbe66955b98a2d102866e6aa00699cd77655ab4bc8bf68e6. 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/QZQAY2123931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb6d0d37a374bf6decc26bb9aecbdb5900361789fc3640c824c591153e206a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42518173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbd63629a1faa2bdb8c38ba5975805c25f046891a3f00ca18fe9068824a8f82. 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/QZFYZ2537366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2f8e20dbd51f9543b5a62ec8f495918534cdd66c243821df8acd208462feca. 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/NLRD51968543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44ca260306e02e62c9aa9c6e56318cf1075e8f67e951c89e72fbe629d8d3648. 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/FR96X2597041.