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 0x9a6de7d84b8ec89d37c15b0dcd035ea0e3e04426354b5257090ee0047ba9be5a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6464951-df60-4dec-a73e-a87ea9e1ba9e.json and https://artists.proofprofile.net/proofs/artist/e6464951-df60-4dec-a73e-a87ea9e1ba9e.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 0x42c5a9a0a9e9511300349d3dc8b276c03e10034680480be5dc3dcc75e4d3c76d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAFD2086252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519b8b9d7a82edd4f302b11a6f2e72c562dc6062ff9cf9b466a2c5c4de6f3d12. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAJK2537831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679f667acf1515fc369cad2d49ca7e51f4cf418766a94131deedfb9d29953546. 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/TCAJK2537897.
Huala Endaykocheshe (Ethiopian Contemporary Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253c27474f93cfa4073c3d3fbe1e49ea8db3b3226f7fc305cad31f951f940878. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM21273514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa125a7c61db714c43c4682c5a1202edd4adb42a81c885581956676d1fdf617d9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:37Z), 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/USHM21273518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed25f2d3535578255b1f1333e194e7c67c9ca826c02d792761a6a8df4b5d743. 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/QM9AA1572376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993c485e456464dda8e4336cfd6a0e7ffd594fd85979de54a0904159f0cfcd1a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM9AA1572377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c57eb36c1845c875560fdde9c8b1afc7c7f931df1dd540ef2cf2bb6074896. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QM9AA1572379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b961db7fadacf2787a84c3e84417390fb88d0e2e37e66caf26fa34f6d1d5b6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:58:26Z), 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/QM9AA1572380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf863f75f20c94a4b22669b2bbdda4ee1db163b4bac07571662256b6e87371cd8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QM9AA1572383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0be1927ecda9f02673419ccf147b7c8db31aa37ce72aae5ab63520de909d47. 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/TCAJI2599613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771cee2c33aab9701b66557b83481e0beedd66a65048231576a7a01cb9dac98b. 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/TCAJI2599671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b13c81a3d34033e60cca0687591e126f5e48e25a8a5290aa9ef4997c4d814e3. 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/TCAJI2599678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e676b1aca833c2f9dbc3ed8ac9085b0529a9e107be834ff0532aee8497deda. 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/TCAJI2599706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb8e9ddf149b34fbce83d81ccd134cba4e91f9efb636ce902c266eaa0e5486. 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/TCAJI2599782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacdd7904021a6cacea10de691e2e1fac272d9a31b0061f79e654589c10601ba. 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/TCAJI2599920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb61bf9ed5eef75e9c3f0a3bd79521df66529dfd29d19628ff38697c44129c3. 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/TCAJI2599930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db95c5388fbe14333aa86f0cec49018b5adda00a062e76e593d66263964eaf. 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/TCAJJ2599935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9e07c8a2be9025cd449fb355ac9067deb97b4b3755f16db17fa72df6ee13b5. 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/TCAJI2599945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a2bddaad3304096b81f1b62528ad99aca95eefc44ba3a14b54fc7d3ce3cc40. 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/TCAJI2599951.