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 0x1be735556f4fa62e85b03c301dcce880843d005412fd3a219e3b97f6db988c54. 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/32007900-c9b6-4c32-9018-45239965e80e.json and https://artists.proofprofile.net/proofs/artist/32007900-c9b6-4c32-9018-45239965e80e.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 0xfe90ab28ab65de9159ade300668ce7f4ec63d3724b08bdaa71dd822ddc7a99b0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKJ8H2101303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef400845e09164f6de3f7dba1c70496062e943d9fcdace1c5da622fcfb4bf7ee. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:06:00Z), 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/UKJ8H2200517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3706ac437b6db280f91e307e6acab45df84d6b249eceba5f4b81bb1c6b046d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKJ8H2201170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52373974c14a72f1a3f9d8451dcbc2066f65fee946abd45e91510ab5f2203cc0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEN2283838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785deda8dc50fb3d70adf6bd157db5b5944625e839de49de5a0b541539980c8b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEN2283840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e579bd193e366b669d2937ccce9ee1739c9c733dde4fbac0fa663fc22a621. 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/QZNWY2248691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f69e1ef2e6e938b74d1ba312b0536b91448e85e40e4ad1d3f9798ae3a93a2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:14Z), 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/US38Y2304834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4473ef187f8782a6ebaf23f82f0a9171d58707ea3af33ac4fe354f952ca117d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:04Z), 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/US38Y2313071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa243d4307f58591870c2ff19b38470d1f77fade2c2315cd1bb4fb048fa6782b3. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZDA72548217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ca2ef7c84c237cc64a77bca846ae164c858db8b3b7c2d918c1f202a67beb0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZDA72548218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc9e627a9f4b1ce0e2c3894405bc05665de9993d0e7983efcc72febde12a132. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZDA72548219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6114a038063a1510c1fa8fa61ea9b989fb87eb87a6a65003aa784c55317bc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA72548220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93000f3e0c1a1d257eb7a01962cff41455c8c5ae4042f71e1c6103dc7367a0df. 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/US38Y2542582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca9fc43b60f2f4e59707a5b8a6ad74d4ffcc3e168d24344c6c78bb16795a041. 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/US39N2312352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b519053354fcc88f78dcc74e35b235b4664781ecb14085f7e4658faed57571. 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/FR59R2547034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69323de30bf8d0dc2b4ce203a63b18a4fc143cf286a076170640230f603461e0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US39N2312353.
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 0x471bfc06ead9c7f15942ce9f1a66fbbd394f9f62da43acb6c42b9f470c18d444. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US39N2312350.