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 0x0d90ec538b8bbd9cb94641124d02447cb2e96f4ab1a4e8df8fac4b7fb6424e0f. 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/ec93e973-1921-45e2-9466-fe2eea797d9a.json and https://artists.proofprofile.net/proofs/artist/ec93e973-1921-45e2-9466-fe2eea797d9a.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 0x379c0c7d6478a6261c925957f1454d05bd6eae1b9f7581f6d468a3ff880cd85f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:22:03Z), 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/PLB380800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155f6d74d96d2a14d0cdff0ea451251c86df3c4a592ff3f684d66357fb149e15. 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/PLB380800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f6c7c7c8b47fa051a2c20308a3db3eaa4662809914083a4fe4d73824732bbf. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLB380800225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d666f4c8cc8371b952f654eb1f53ffbbf56f1dce6986790c38aae0347b2313. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:42:52Z), 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/PLB380800227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6860cc10a3ecc92df780857317c7818c894ed5e45e7435600af8eaa1947b781. 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/PLB380800184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818ea640341d7c120bd92e3641d0e7fc9e2a217f079b6c4f1842e5af1376b63a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:52:50Z), 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/FRX620550180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a13d24d7835558b6c597777cc15877e29379a3eddf2cad3611c8b794d6201c. 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/PLUM71600693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39900be05098587b76264a187725efad809f492bb4e3400ab0fa488623dbc0c6. 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/PLUM71600694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fbda841cf5bc95bbcca08cf14c65de33f3c624639a0a21aae70c7ff84ad083. 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/PLUM71600698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48c1ba982594c7fab558efdd7b3ca206327e60586a02a70505e759c52abd063. 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/PLC592100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8510687529af54ca9fd041dd5c72564dcaef2d2a756fe572d98ae32f22e12f59. 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/PLC592100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c2c2ea2b17b6f2a9222bccc2c42a6d760a76a12b77d0e7c4863e16ca7bd4d. 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/PLA552300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1c81c8a1b210ceae7612412c718f97467286363c439b867324f046dd306d35. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/PLA552300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a8a0474fdc2a59cd25f26c9741d2b1f7a86c165f4a9e4793d4e4a4662204cc. 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/PLA552300468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c2c2ea2b17b6f2a9222bccc2c42a6d760a76a12b77d0e7c4863e16ca7bd4d. 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/PLA552300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a0ad4e6d561ab773e91b472899fa1afb50522d4e59462ee61253db390034fc. 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/PLA552300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4111c6e268f543ebc40651df0ab97e970c9ee31bfbd75cca176a664eb95abe0d. 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/PLA552300475.
Lutoslawski Tuwim. Piosenki nie tylko dla dzieci.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a9f25e3d1fb5cfa3abd1fd049ce12f4094db43ba6c14f27d691da6cb4586c1. 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/PLB381300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56b4de7119b4d7e091b840f7a88262cd3ddf8a9a2ca8a6e1b33f9d74442ba13. 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/PLB381300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c60b9834336eca378dc4691e94bd2c1d3dd62e61fe37fc2f8df64a62983df8. 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/PLC281200015.