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 0x88291aa684a9ebfbff34b6aaa49e84c856cf01fe4f8c338ce76dd96b09f6600e. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf6aaba9-b20a-4f7f-bde4-9b1f3ab2784e.json and https://artists.proofprofile.net/proofs/artist/bf6aaba9-b20a-4f7f-bde4-9b1f3ab2784e.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 0x335dfa154f7c90e63285d3c7cf762cf8121cfc497084aa89dff404a7d1460eac. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6L2514667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9990a8bdb4101ca5e9a915ad17c123e3d27b7708782540ab5ecc351d8097f721. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6L2514669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d622b75c56abb471d3a22e70809727ab5398373b341c2c0f6569588958305e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6L2514670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c58d7635cbcfb0d674f4400d43c8cc72f99e961d41aa29998564f423201263. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6L2514671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6710df0983e933a919a30628d9da2b8163cd2287d6dfe0b8d2804a160ad069d2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6L2514673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596cface01ccc30450c0d839a179528884d8f17c99c5fa2d0ca60bae8144fa8d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTBA2526784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425d6e6a2bdaaa6c219e455694a24296f21a8658657c9b9823319eba758399e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBA2555682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d88cb6e2067c52059fe7886bdab4d865f040d5be1cee490d5d3b3acb9e2242. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFV2517725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4dbbfe7300146601e8eac593f016f5ed7c693fa251e4c48c34959637035c9f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBC2579113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62729407b5b9c2e4fe5179a9ead6c96ccd353616da26d45f59f5485f8020be4e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2577311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd1b54b3c5146ff67e84f56b475e0ef0036ec0e4a236f0c64f905862c87f31e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7U2508101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30871071abb9c4c4b10a9b62780c8b1a4fc9d826082827ed7c6639c20602934. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7U2508102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdbe497e6721b175178a6218c19070bf5d84ae88cd8b4b44b349271ace6ad67. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7U2508103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa643d8b5435e94003f698ea8d339ba4e1f678a109b25c205957d79ebd0c2e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7U2508104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a94ed69823f17743dd9d954d7496f1c147a157c774c157e0945854addf3b38f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7U2508105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5652d1e397ad7456f27a57afa636bf1376456d4aa126f0470ae1fe4c7e5a6fa2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZZ7U2508106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472e5f06fcffcab947b9190a2c84e3d06ff0fdabfc05fa76b6e2653cbfe322d2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7U2508107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d1f33d1791c763d8a955a15017db9d4ad036faa9bdbbfefbefe4e2c76ee65. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZZ7U2508108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f15d23bb6b70b25a4f56ae198750f8d61febada89cc9407a8ebaf3e768b93d. 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/QZZ7U2508109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fccf61c33bed5ba6224ffeabe08039deb449524dfa8c18801a51377d7e8cc9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7U2508110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1aef5e1b5c0077c33907b88ca72f751ef0ba1b3856af622b70f510e0f1e76. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7X2565646.