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 0xd5084944b074052a706dd9ab1dc3ad9cf1d9fac95a98fd17072de82a1942a197. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d94f05f2-86fa-4615-abd6-e7564a9bfa00.json and https://artists.proofprofile.net/proofs/artist/d94f05f2-86fa-4615-abd6-e7564a9bfa00.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
10 Years of Rhythm Section International
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 0x79ca175387002fa15a556434507fe2bfe958ec07189f6e4388ed76a6dd5ff4a5. 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/DEG932404246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c566bcb24a92e5c320dd697bb8addd4db1a6720455d3b16215d6ff4763d1d9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:33:54Z), 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/UKB8U1600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8817f4fd3057ec2dbbf538df8e18796055f509ffc1aba43b46071f8a0d7a63. 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/DEG932404231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf539e34d72f9e9bb795a80bf8a4e6745087a9d6685a0acd417811e3f6c20f2. 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/DEG932102191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c792a0bb81daa9370a040ff1c9caba6694cbe8bde421645c4767855ac8396c. 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/DEG932404228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7d8fa4724064db116e25fbbe496566a3e4578bec2a164dce7c560ceb226f0f. 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/DEG932102207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d33d30fb27667df1ba1f2f9e4848969369ff30a4cf09ca9450c67f99470b2de. 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/DEG932404234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c6ed52f76dc1da16adcd2680bf52de2e4a2e01206775a90708d7926753b990. 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/DEG932404235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc442921d2c796215e986462779e4cbbbbed431bad4b7fd256cd1b0c4ac648e13. 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/DEG932404236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b77ba129470bfa20b9972c47e6b13fc8fc79d5460c5bbf4f02f98d331dec9ee. 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/UKU932480308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b6d63e3079c0486a6606d42cf6d86c66683d5999a3b4de7062d88f90feeea. 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/DEG932304903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca86c81bae44fcdaa49685b7f37a9a3c72a1abd2d6e18baca447f67719d5c7c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEG932304905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b6d63e3079c0486a6606d42cf6d86c66683d5999a3b4de7062d88f90feeea. 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/DEG932304903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc5473ca58704e43569e0ecf46e2f9e842e71381eb39fac18d828cc711da647. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/UKWNJ2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7208d4b7790fc89c0f2e5c873b8539aa604ed4dc87f027c8b06bc415d261321a. 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/UKWNJ2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d840d9f665b55ae07131762c6be680410a11d49f1e0a73de23a46b1d531803. 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/UKWNJ2300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fa68cfeff8634396c1e87406925c29689e1984a5a12d2ee863e71020be54c0. 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/DEY472371129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fad0e369d87ba6114ce4d0047a2209763b6c833e117898c5e41875d90b13706. 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/DEY472371130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefb16fa0e684494e47abe9bb7cb66fe0f2deeda7f4b958bcaaf417938359257. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEY472371131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca44b4cee006022df92fb2d03d3ea9f8e46cd4eeabd35c7e18356361c2c27e54. 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/UKL4N1700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95372ae0a560ec67ec4aae4fb2cfd6c6923591cdd1bab67fd1bded29f0987abc. 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/QZKDK2054459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf074ab6fc526a82df1468f9e7af47027a1bf81c2592fa84226bc151c63a36bb3. 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/QZKDK2065137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d1d8b14d4691c368539c544db2d47058f3fd50dd334ddced22f2fb696f07d6. 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/DEG932204024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f88e3cb162509a18671b2d741da9138573cd92e9871dd4e03ca8fad1d74bda. 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/GBKQU2377803.