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 0x8572157c631438e2cdd5c7186658fd0fc486671cc48e80182d9bf33a316337a8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3ad36e3-0c55-4244-81a4-3075f73ffe93.json and https://artists.proofprofile.net/proofs/artist/c3ad36e3-0c55-4244-81a4-3075f73ffe93.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 0x034c27f67fcb7b4591615ea65bd34c0917c1c619e4eb8ee0b5da9e2fb028d1df. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBA2465283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d01f76f513404a18bc1ce1be7bd1813ae03e7130799577bb9de91aa3f78dbf7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB22427911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed6eb2ecbddc82c138f8cd53a898f5ef20cb0e75b11407e76c73894cda66933. 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/QZTB52445949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cad17a92d0b18f7ffbb77d5a3537c3dec268073a1d3c31ed526617e436d096. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAZ2408533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9074df1a600bc43ba76b1e21a73347bf47112773c7597b279ccec80d6c58257. 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/QZPLS2410347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af568e9f63c5d57fdc10262b928d0ea849d855aedd5fcb92e5e7f39727faf2. 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/QZNWZ2427669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb3fcb15b6b2d3e51463d92211f4353aa3378f38a99d96ca33b0b299da5c0b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWW2430085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf643d0e30f469073d94c3bdc2e319d01da53fbf1beb6200e900ec91a3ddcc886. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWT2443858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3384e1444610bada54c97516c90f0fa05edf07825d99eb4de3664f3d54088. 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/QZMEN2415434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a56a4e662cad6d4407a8b59e26f4d2d0d3452424f5e80470c26b6c42f3a79c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA82420351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30bb6b3825baee1600fe1b23f4a799b61def9a6c7cbcbe437866590078c93a1. 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/QZDA62423603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe184a2bd5d325900faa6ba50dc1fb7795ffa61c3281dd5993aab9df84ecb1982. 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/QZFYY2427738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a45ade7e595f1d02eed8e347300df759e3ae68580eaf231e74accc8d90e9e. 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/QZTBB2305803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb32f1fd25b602ad114da04792a54c291038af9425cac8f6047b67f40f9cb9. 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/QZTB32303422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ec8fa77951bcca6694faf77f4d2b2c46744fd6083cd78238de599359329baf. 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/QZMER2363650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab157a19adf0d99f1e5459e18e3b67d6bd8fb3a8f35014644bc8520732a6c76. 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/CAGOO2503094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a78137ef2d7fc6c788b67d39475d333ab786ab03b3da317aed334904547207. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6M2500609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f42dbcf6bb17abff3d61133829c66e64c653254169650c598623048fb6e0f5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHN42557781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc2124ed9559fd2da97c60deb08c85b367fdcc8671db27b2e5d416c8d3a0c8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES62539548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad37dd005fb5c1ae71dfddbc6791615d23b8d100d466b1083c6c02187de324ef. 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/QZES52553473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77d89e243163633281fb8437fe5f1876651ed3be1448b0bb77ec9de1814365c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA52594917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa574227c92d35d6d1d5a141e3315d63faf4d1384f4f3a27afa3a23d492e130. 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/QT3EZ2453139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03733c8b295c901602cb49166faf4b32e3606fbc088d59c56c0aef4f9dfb8712. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZ762461037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57980a1a8d3d34474cc1c6dca48f1a0ccb2edbafa733d1ad9e7eb7cb479f14b5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ772457618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe008a82ea4b5e3cf9f1f34f8d40b5063fb7de15257d49a6bc9aecc35bf9fe0e6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZWFQ2498681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c1ec5d03cad9e3f8e2832ad115b150fa966dffccdd1d5245fa194dc793aa3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBF2419078.