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 0xfe8f61f30959d0a7e96574735a5070c2284bb8ceca97386388f0019922199f64. 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/e6911c3e-bfd0-4f0f-bd45-fa7ee333b6ff.json and https://artists.proofprofile.net/proofs/artist/e6911c3e-bfd0-4f0f-bd45-fa7ee333b6ff.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 0x541fbeeae3495eccdc3b0f5da849e6582ae7a5942d5f411845fcd89b663ea5a6. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/PLH791300644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ccd8c32ddd4e3d5d1d339dd4442d6eb4ad905c7750b2b3eba2f1769f42a2f5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:55Z), 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/PLH791300771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d1238f03ac54152f63133b6ca83a750b2ccbf96ded24716620444d2a4db1f. 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/PLH791400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d9afb6465101c04931fe1b785da3f6d2803fed84beec123ad1281728d1ef83. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:59Z), 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/PLH791500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c91efc44a7e50936df867b3082ce42689242191e9e8bf4f4bf5a7633c1f54af. 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/PLH791600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec39c09b2b692ea5a024324195c1dd4948431711cbaab15f82b6a3a5fc1c69a. 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/PLO381501816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b1d5065955ddd56e9ee4d2cdde59db49f85d3fb6d871368d426efb581a3eb6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLH791800006.
Jak się bawić, to się bawić (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ead1d122d942c58380520080cb629af817c7d190efd37083717cfa20aa34ed. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/PLH791900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc783ff6cec5af8640edf9d054ffa5a4387a4271d2da3aae57c60d2a6dd85068f. 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/PLH791900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7bb19c72b2bbbbfe6928295dfabe382fa5c7dec2da427c6af247922c9d7b78. 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/PLH791400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec39c09b2b692ea5a024324195c1dd4948431711cbaab15f82b6a3a5fc1c69a. 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/PLO381501816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cfeafe451ac50dab4d4b8645d48137811d4d9c382b870921ea32f51996d590. 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/PLH791800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2535f23b8d4a73685d7e8ea2a2500ce92d441db6a7ba7fe35f264c1d4000ebcd. 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/PLH791400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a5ecc6faa85ff90708f0009b0379ab716c30ee69c1a111b9acddc18c4d0141. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:54Z), 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/PLH791300643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267eca362fb1e438fd07fd43a2529ae0c4070edb1690e71696a74dc97b24325e. 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/PLH791400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbca38699949a4ec9e3a1deb3afbb8fdd350008232adedfcd9da00442ca6fb7d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:55Z), 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/PLH791400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b43230a268c760687ea45bf4093077eec9040e00e10cc23594f28725fa08783. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/PLH792000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fe85dbd64a0a29dfb77721d62c4277b81a39dd1dd22a848251173942802b06. 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/PLH792200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0ab75a7ed7010e613310e7b498b6492ea2a751ab709fa4c3e53eb1f02418c7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PL71Z2342760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c76c42fb9ffcec6430cabd769d77f5161909b8a9f42a568d701d341e506876c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PL9B92392042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2a5b93ddf23e4fae3d04a1d6c13cd75193117a8941e89cb3d9a1f048dafad8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PL66V2481381.