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 0xb27b8bae629a9f48279cdea0a9bc5d98d51f38d9d597250e48992e2bcb93687e. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f716139-d603-4911-9971-86e054efb754.json and https://artists.proofprofile.net/proofs/artist/1f716139-d603-4911-9971-86e054efb754.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 0x501a237783b8b05bcd27ea66cdb30fe495bcc1bdef61cbb956c2f4f2913b0f1e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US33M0520601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead362e4ca4d48a1867e31acad6d29fc2993a141d42a7e20373cd3092f564e8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US33M0520607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459ae4d33363245ddc86dbdfae12bd4ad7fd1ef1eed5377cb9b82fa844a324ff. 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/US33M0520609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a31f65d3c57693deee6d4625518e5b5ae6500560db2eddc53e3e41ea4d7f4f6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US33M0520610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f08c1f1831642ad0ec4e96fa01aeb8a63118f5107db7fb0c6f5c7b092873b38. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US33M0520602.
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 0x283d9394fd4e06146ec362c6b2259b15ceb5487ba94479404fe64c52785d7212. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US33M0520604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f53e133ee15f670a50477f67c8367b827804dada09a11d0b827fd0e9bb71fa. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US33M0520605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09d6f3ec6bcfbd100a2ba85f48a6a85d3965cc64638b2aff082b1f595f62037. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US33M0520606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc55371a43b3e97d40e16d4aae51fd49ff12fe0c36652d9d8635d54d96b3ca4. 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/US33M0521702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8899011ffd3b19807e194c6f02ec879b0094237edc42ceaf342f5a0a96d89b6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US33M0521703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70be895d1db16124e784626e365f1cd6c07aae00bd49e49862415bd3f4599a90. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US33M0521705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41b8166d61306bb5440ccebd4bc5ca1a787cfb3b5fc40def3b264965c94b4f6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US33M0521707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7281a886bdea367ae9991221a029062f673b4c29b76a511f8302106fdefe3cc. 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/US33M0521708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93482b11235d15a461b29444c562a3437a58138e557d705afd85ec16603e5675. 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/US33M0521709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb714c18c23a769228d2db49ea4ea128a1cc83570c2a6dcd0779c32ebdc8aa21. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US33M0521711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4767dd5a54cc138835d065e0d74ba3cd154b1817865923ae3036e1fda559643. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US33M0521701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ac1198860ba45835ffcd40a22a4381892e098ad5768e17542b8ea4b463f73b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US33M0521704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b1cc82ca0f1059d995493d73ddf1b574d84abbd98af58e04ba7133ea8688f4. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US33M0521706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f7b6ae917aa8a5375710f9d09193680ba4b4ebd80f6f2a667e8b4b7f90049b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US33M0520307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f7ac4e050e19671a9e52b401a995cfe7017c946651bb04e3c3a33700f65065. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US33M0520303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8bf4d15b8e4ea95c50b7d2e58acc6ecc315e351d7a008009321193639c491f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US33M0520305.