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 0xd2bc4e1769612b825ca042199e41b5daa284cc2a9291ab06d8dcaf303d0278ab. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6157046-986f-46d0-9bbb-a70790608dc0.json and https://artists.proofprofile.net/proofs/artist/b6157046-986f-46d0-9bbb-a70790608dc0.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 0x64fadadf906669b0e2be73669d55b81b367fe43f38bb1662be3be4cf9cd87549. 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/QZQAY2332229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c8b2eb0e7168a18cc17f42fbd1b60b8ea97cff9e6ad39495432a8c1532da8a. 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/QZQAY2323613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c17576f52581ec92200829f2196f5f6e3bf815c29c16ac33e7675115f614eaa. 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/QZQAY2349832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c64e95feb27407117e46b2f9a2886edee80a49f5623677ab49aa1d79ab1458. 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/QZRP42123248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d56c0f3021181fe0df774404205e68cf7d5790add6c7425a063731af7dccad1. 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/QZHN51909631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf778f301aac453536b625eaf886608d4dca983bfe7f9932ec86d6154b1c9c073. 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/QZFZ62348462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0783cee7bcdbc6c4948f8d58320a54eaa09e00ba095d509c2c25b137651cab. 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/QZNWV2218842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb819ec9740c38c617abe7781e05bbb56f967d5fdeb2dbdc4a04315fcef19912d. 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/QZNWY2258096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81750d7f297d5c6da1f4780995e96f210c6768df1336cf3fd346f299a7139902. 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/QZTLA2461760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2917eb00d85ed162e43708bc6c0d9312d9adc4e837ec29cbd10bb46eed3caba5. 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/QZTLA2422322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e5884979195c3fbb1a6adedc20446237cf7612fc6086c0edfe9b8129c1596. 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/QZQAY2518624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccb0c603fb0ab73bb8c71a2726f638eb86b3bb0c5c235abc00326cc16f53d45. 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/QZQAY2568575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f5064e5092272cb66d5edc85f77510448625f1f84fd1663a3d05456a45e495. 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/QZSYP2552887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b22154e775b59b4612bbe6c58514b981d3096496d813225841182bf3af7bf61. 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/QZQAY2545249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090aa8740a9ef195e4897181b18f82a1e3215fc7399366a04c378b8e246e1ae2. 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/QZQAY2559782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980e3055c360587cee6f0f1972fc3b55d0e6db2ae9d29e728ddd0b84ec907af9. 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/QZQAY2556658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83786da15d35c4c2e2610a215c2f51ab48d014f6de910043cc0bd01d80ee29ee. 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/QZQAY2593346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b22185ca2da2860f74d5030c936b9b002fec52bb9bc0b29f14b334e9462e47. 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/QZQAY2547222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a8dfbd7c68b4571e05a34e3bac98700ef4b91959f13695f4425ebca8f4aab. 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/QZQAY2515952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dca174b40cc210427d51cb3e1e996951f5f1bdfaaf510a618f688bf493abb0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZSYP2413642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0a2adef619dd3811ea7cce94e8477c84bd4636359d7f6754c945bc5bf84674. 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/QZSYP2442841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210ee59368520b3bf4315f9d744ef272dee2999630b8e53d14f9654c5b5728fa. 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/QZQAY2536453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43aebb84ffe1923498768f6377defbd5be95f1fc17f2071d1d8c7fcd94bb43c. 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/QZQAY2549734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9378ac2803d6d8921f24664d62c9c5c13cfab230529bff53a077cc5a06e3757. 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/QZSYP2524990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb158e59047869a6316f0d01cad8a98f7a573a232c372778cb77e6dc41b38f. 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/QZTLA2514078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b30b2681d85ecf0aeedfe34b44e56fa9cdafccb12eedfe201202278625a623. 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/GBX722000133.