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 0xc0427974924b42e796b4b6b10ef005ffd073c662a1b74e0c44e5251956947997. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5f248de-575b-4d75-bd1e-91dc1ed2494d.json and https://artists.proofprofile.net/proofs/artist/a5f248de-575b-4d75-bd1e-91dc1ed2494d.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 0x4cc01236ff55aa77a1472a037f9c215aa0b3f203da71f7a7b1ad564f76e9142b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA072308206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae637a73cafb449fa15faeadf3dab411c47817172b41f2aa9e6c618e30ccb2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0P2361675.
The Last Song (Incl. Juliet Sikora Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc504b9b27e447df15ef950a37bf7c1fb0367a8fdaf81995162e675b32f74802d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEW872304126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a750b3d79b6073e1134a0b64eb42e13daca771a40f9a9c3f745f5820d41ce81. 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/DEW872304119.
The Last Song - Juliet Sikora Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f772bfbf1c6ec73ff06e008a8371f2a22889b131341922a0658e5518d1970c. 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/DEW872304120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e60f195d743009d8714fcd1d8a9ab6ee6070cec0db1c5e1da2c75da61b0ca77. 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/DGA0Q2314509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf0faef81230cc1451aa46fbea62d59316f37d1f4d7c8ee4761d65bee3d78bb. 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/GBJAJ2301335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda605e3034be777c92a19d786d51b819f7f9bb813a617d806265b6677dda8f99. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062343152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d55b2451c5101a1d02a49a60073f13dcf089d004c6216261b2045ef10bbf3bf. 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/GBKQU2356632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cb7b103c3027ae2b9efdd658e7f58eb48f0151de24aae74c264c729b42e157. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2356633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bca7d03fc0cd9aaf68c20d589f212d7c3bef379f53bb80cb407a1b8a0c9ff0. 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/FRX872376560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71aea010f1617ac31cfcfd9848dcce9cb0537046829ed4ac77da6bbfaa74ca3f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBPQS2300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd9467f4f1ef7b905d99fc035c49cb081c660dd57326a50d2ad7fb9a44db973. 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/GBPQS2300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f1bf182d7c897cdf00edafc2637135ff40e5bb02fbbb80c5b0e1548ffa8d04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2322066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276655246888b54aa3e1843295b3f6a7aa7fb6288481d9866af192591870b011. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS672118066.
Keep Talking (with Zemyu & Aaron Pfeiffer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa1dc10cad37ef83e445672383ecc69f02e3b01fb23a23795fee7bdb8e68dda. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC1906128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c7bcdc8dac92ff567033a1e6a15f1aca26afc520670588c98ae5b5f066a8b. 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/QZHN91915417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be00ee030ce161a16f4d1184647254e06596386ec92ada3b4c75daca489d75. 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/QZHNC1904841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa1dc10cad37ef83e445672383ecc69f02e3b01fb23a23795fee7bdb8e68dda. 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/QZHNC1906128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be00ee030ce161a16f4d1184647254e06596386ec92ada3b4c75daca489d75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNC1904841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c7bcdc8dac92ff567033a1e6a15f1aca26afc520670588c98ae5b5f066a8b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN91915417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2129518ff537d16d9d6ab34d3eb2bfffc878d19f5e84123f864f92f7d516970. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GB7NR2328602.