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 0xab96eeb9fdaea496f30b5c7819343f3d333abd0cdbca4d7597da3cd8982e4780. 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/95ab21fd-2066-42bb-bed7-2ab69182a1c4.json and https://artists.proofprofile.net/proofs/artist/95ab21fd-2066-42bb-bed7-2ab69182a1c4.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 0xcb79a6c0a9286297c2b4090c922023da667a6f2928428222e9de4d064e308596. 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/NLRD52200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726b185ebd309d5908ca89487a97d5b24a92f1c4a4c74f70807e04b855673445. 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/DEXO22025221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef7bce976c85afd0557c8f080e4a733d1fa485ae5b7002d9ebfa04943a2b28c. 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/DEXO22025222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d6a7cb80fb5c6f3a0d8f3c8d8433beacc4854de7c6354380217db8f52c96e4. 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/DEXO22025223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e010d8edf08fbd4e89ebb197e9422b7be41cf87ee888bb84d3d474a2486f315. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEXO22025220.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fedec245e3d9f27fd0484bb4eac8d91a86a6e54bd9c9a6ae16c25bd8ee51ab. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEXO22025225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0ce29853bc86ebb741a941f4a3209bfe89826da953d03e25b612f2ed38b841. 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/DEHM81800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13090562dc5ffed5283d8d5bbd12743cf1639cbaea9e9b3c534e466b742af0. 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/DEHM81800234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd036283f07d03cfed2eb4184810808685878ca209c3ae97a1906e5a26cfaf00. 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/DEUD91844853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3176d3f3250c34e797878572df9a0c05746f19c76855d70c138cc5fc13fc45. 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/DEUD91844854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226bc50c8c7b210d263bc6d8a553c1bd9c80ccbdff41eaeccb39df811eb694f6. 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/DEUD91844855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcf36e5eae7dfc20cf0b5ab3898dae50038a72028d57b8e9702a8a0b2fec87e. 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/CHA811800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e374c2eccad1be28f832aba7749669a970b7596e509465a1c26516d76822ab. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CHA811800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ff39090bb762a1d880f5b8fd67b2f4f1270772cb0a25558162ae9d2069c0fe. 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/US83Z1787892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fefff8978f4126312fa54a8fd8fc18afaa6f8cb43d24faf98582dd6d4bcd07. 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/DEBN51710103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c293c86f506c53247fdb1168e9a3246d1cb9e943e4619df5b47d3d04bcb47. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEBN51710101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f0cdfefba35e649b26d824d327f470aeb9232b417f55f91f0ec4cd4705ab7. 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/DEUE21741315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a28da0078cbca4219cf50261aede18dc66e593311c470914968daef6358327e. 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/DEUE21741316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4dbe81cc0578ac37bc31ce10fc7000279ae0015823af6d6565cf645b7e4da6. 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/DEUE21741317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b71cad1ca07a7bea3ed1e407085860b9c84c6764577dbbbdfd60ba9d960ab7. 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/DEUE21741318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b99d7d7ec603a9edcc7710e0785a7ef10690a414c5bf3c23861e738f193a51f. 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/DEY471719789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e68ea664ca7fd3006ba898f2aa67e8a545ba939199ffbb04b68531aedd103a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEY471719788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d73c554191efe32c32c0420743adbb852e14b1d096a2adf6a0a21cea75d2d2. 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/DEQ121637952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6230215a4fe8dd25c1b32c65ef42cc36d6e689dab9a9504ae22a64f9e083860c. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/DEQ121637951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563de2d6e0a6503ddb40966e959639010a0bce8b28edb75a8a75ae1f1da1130a. 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/DEQ121428847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb19eef4065494231692f74a4710a9775ca2407f1ae54592f4e93661d591c4ed. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEQ121428846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27a56c6e279dde78dad8049dcf29011aac7bd4fbcc8a6456ea9c62aebe22282. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEQ121428845.
Schneeweiss 14: Presented by Oliver Koletzki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fddb23120a59a703e8b7454b9b059717d3d5c582296e2af7af086bff71769e7. 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/DEXO32235900.