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 0x01e0e0d1e14f14a9923a6e46afe23f36c99c42ff6013a390dbd18aef7234e50a. 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/919b888c-d0eb-4b10-aa1e-c6f165e401ab.json and https://artists.proofprofile.net/proofs/artist/919b888c-d0eb-4b10-aa1e-c6f165e401ab.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 0xac3c7793cd51f38c589c307e67e4b0f37ac7a37fde0d19c5a6a9e7fd7cbb96be. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USCGJ2394549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbd881a7f474dca93f1409d073bcd283ebe8892b8079973be8a2e75928a3c2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USDY42369391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1412fdb264a7cbbf7ec9ea501d0df8dbcef7c805d0e6a621625f7c4480fd6f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USDY42369396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce718503148055cd48d0dedebd59ac844260a24aeee2dff6232bab2970a8250. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USDY42369401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd46ff3eafb8e16826df9e9ea88025c277b560572db734e20197b71815d6b33. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:36Z), 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/USHM22365695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c3db18888ce226ceb55ca16f90b018fa8505bc8f7de48641fb189777f53423. 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/USHM22365702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bdee1b6dbd63b98431d6c0aba630290b948b8deb4a6d6a0e83af3d23c9f941. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4Q2317053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a153e7c3c01ff9cd0f03130936c841086477514f84163387b42e43275acfb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q2317177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750344541747a8fcc40184f6b8ad3b070ca7df4c5885ece20e5230b4b6b103b5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4Q2317178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f59fdf7907e302ee6d093d03eb3a82aed2ba873670ea7ac16528a3b957695. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USL4Q2317179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228b49e144753230cfd4c9b5ab4229fdb047e2f0dd8288a0cafeec2c2cae5d3b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:32Z), 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/USL4Q2317181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2890ce49b4e46770351aef13e3aa561006451f3eddd68df3c1597159bfe51d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USL4Q2317184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf8574559061d1d6bc27f625a063f57b0dea6edb3d2440f7d85250dfeac62aa. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/USX9P2343010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5966a16b87599dc5d95081598778b83e8843790ec4123ff6d81b3b1e86869445. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:02Z), 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/USHM92433133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22eb9abe509bdc0c4f3095e6c4d4607c9446f051994b97f3d4d5b532d55f4dd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:43Z), 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/USL4Q2465783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459415f264540de7de900cb905772f0dc4ca93756d30d86f38251a6192a85969. 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/USL4Q2465786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eca2e825050d0a0ce98292f5c94063afe67d1f63fa02de599c798e04614bb52. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USL4R2470334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a6600ce35c330645b9aa5a3117e345fa74a81cb886abb7439332f9dee17138. 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/USL4R2470320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421032e3d51fadf4b0c3f9fe8b8fb98dd8905b2c8f2682578136276432a9f7ab. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:29Z), 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/USL4R2470322.