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 0xf7ec735c8d496633807ab92cecd1042b8eacc398e0728c1eb1954a603d50f9ca. 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/2392916d-4ed1-49ca-a837-fcb0f13e276b.json and https://artists.proofprofile.net/proofs/artist/2392916d-4ed1-49ca-a837-fcb0f13e276b.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 0xa9e20067c5521c82de834031c19252e5283d463fe6dc680a61e0e576c7b33903. 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/NOQWV2201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d664fd9088c7a42c16ed6dde573bcc80be463f65e34f9bc12e4ede63e300e. 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/NOGBB1720260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd129a424c2840066ef79f817bf3d963e33ecd8c0d1e4bed7cd976916d169c5. 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/NOFCC0701010.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9ef3d2ae7c60a3ce44770a676476841ca9840748114424f4b2c1dcf479a464. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NOGBB1716090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c62d48306017b653ecd071905152275bf120873aabc9dffda59b6e810d2d9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:09:08Z), 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/NOFCT9627080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb1efb4c8d3ffc533e51fc5869ed77c6c1cd80fc3360cf16c4b80b6cfd6ec71. 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/NOX9X3201303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03b24f8c17a52e439f12fd082a61b79049b642c08434a92a3a9f16d53b3911. 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/NOX9X3201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eff474877abe8c580ae3fd87b32b74cefbd00e154fef6ceacd2ce836650fc1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:33Z), 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/NOX9X3202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52b7424448c06988c79ef8b9d1518b9498c9db70d4df04e93bd18d16f40c215. 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/NOX9X3201902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e45de4a3f1e8dc4c33197e57d2445c03690689662462376e2147cce6e196fff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:12:07Z), 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/NOX9X3201903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efb5314849d383db238366df64a821cb37eac46d427cbdf24980f245a26b938. 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/NOX9X3201904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb59c52a45cfb0f5aaddb4624d3685a6d5490194b905db51087fec66ce6319. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:49:32Z), 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/NOX9X3201908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838ae3a53bbb205a94b009cb4d714c5b1c8832002b72a3bfd2c223d7f3e420d7. 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/NOX9X3201910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86558da21bc73d3ef08895e36a85ef8fd765b43a9993fd0bfc8d02bce9747e49. 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/NOX9X3201916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bfc979b9087b8270830b37fda783ea919125acef26c8c269df6f0f0deeba59. 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/NOX9X3202101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d848fc48d020e5c973b630a9f05366ce475467d55dc52e14d9af434ed7d6495. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NOX9X3202112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347992df69e9c5ecf1d5624068b39599322e25a9d9856f86fe8ee9494f02fad. 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/NOX9X3202301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688171f3e08405c603ba9123f5da08317391885bb351bc9ffa4b34980a43d54. 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/NOX9X3202402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f493ead8792ad2759b155b4eaaeafe51cbee75a5cffcfefceeb000b892e9d5. 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/NOX9X3202412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe240343f32530424852057bbe98876a4390ec7f94e83b240648f1897ca668d8a. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/NOX9X3202601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb521c017c62271f32cb983b4d4165d775dace83cb96f19a48127dd003a8d8ce4. 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/NOX9X3202604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e44d7236478baa2ea0b9af30d63a45bfad4aa2b1f77a59965cb90f4d859c82. 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/NOX9X3202607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1899e38dec5894ba9e582fd23926c48220e64587a0070806a0a83a6b68542b08. 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/NOGBB5801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a78db03bb939b95a7b9d37f4347bbb4fb768e63de3135703a6adfb6fb46a508. 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/NOFCT9707110.