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 0x6eb66a1e55b937682e1edc35d80719239c506ef915275451336832f4d431b5a1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3e9a375-0883-41d4-9ba9-52876fef02b6.json and https://artists.proofprofile.net/proofs/artist/f3e9a375-0883-41d4-9ba9-52876fef02b6.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 0x37971ef320537198cf41f7e4d3e2408651ec2b2cbdbc9a54969db67556ffdb9f. 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/TCADW1852662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfe34d3800dc0b3a5b4145e12e3ae361a0f2ef25884d4db74da0a862e388b5f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCADW1852664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4bae358ba8cb87e139643c42b5c26eb3a76ef42141a1ce35577f57e5a298d1. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCADW1852670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe52a60f990ffd028911e2152e07845244f39483606f1b16193bda949b1e01d. 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/TCADW1852679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427fa8059bc35731ad76158af15ccee57ef246f37d4c2323a9f97514c83cdf62. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAEY2077590.
Little Grey Mule (Kentucky Mountain Banjo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993db97162b6df86a3d9b0ead8891b13a50b5379ec66e9fdc348674022be4c4c. 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/TCAEY2077594.
Brogan Boots and Leggings (1870 Minstrel Banjo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5954a8d5b01a8d27bbb0096b16a2e45235689e29ccf2b2bc6ec9faa2cfe4d5e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAEY2077598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aa0d0b2db880d2c8d86af86bb61baa2272420c3f1bb3b312a2baaeffe367ff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAEY2077593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9309df6c1d079470174f85ec79cbc1abb99ca3d60874cf73e391b564f1567606. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAEY2077601.
Hard Times on Beaver Dam Road (1888 Luscomb Banjo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445333315ce94fd0f25d68a7f8b6f43eb3d7334c39c63d1b2254f224c4a598db. 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/TCAEY2077659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cd3eb8fdca51cced9d2723365bd901f4b5a872499bc1a30cdbf9876c85bf3e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFP2195770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e96191aae1d18f300e26a1fd77a0f82e8ceebc7fc856e0eff66d970940d461. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/TCAFP2195783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2153de7bf43c80ec58d13da3466e30e490cad3382c278ea3df75e5a7da86da39. 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/TCAFP2195788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23bb8f2efc7acdc68bee6d528869ff093cd6986590329344e5203a807a938a7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAFP2195792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ea5fa4d2fa803496da4311b9ac2082247eb243ed6aa0e7842edf3ed0428c6b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJD2461172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814c76a63069d8c5a222790878aad8ae7307d6851cfae5a8beb3173fd683bd8d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJE2461193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99bc6e6802196fd0e92d2cae81c7f25f570f9af2f0afa6e6cae1931ae01e41d. 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/TCAJD2461200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8521bbdba804e72cf4cf01f9621a2bdc337e4d19a1ff6f5d18aa298aaf83964a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJD2461204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7400a621f5e5ba2ccfba26d572efe14f39c41aedeb976be7cd2b268af466aa9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJD2461214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7d57cf8d1ab86c2d229dd8bdc034e8ebe141d5b9f3c2928064ea8c041e4d58. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:19:44Z), 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/TCAJD2461224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bfc1ee0ea32d186e9d9761a6ae1026798b26f8426db53feb986c5c98f2cae4. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:17:19Z), 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/TCAJD2461229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8dce4e17eda306e85f5039008486d2c51093acab54d3ccf06179bd542c21da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJD2461234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b0c52f09ea35478f735a88fb6b0c5ce056c1ab7d43e04c714266a9bed86a8a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:30:34Z), 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/TCAJD2461236.