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 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 0x9db4b93f9d63a8a9a5bd160e5120d1f6b157b1a84cc78096a997e24ddc38f6c6. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16a05dcc-068f-4116-87c9-59c4f8fffb1d.json and https://artists.proofprofile.net/proofs/artist/16a05dcc-068f-4116-87c9-59c4f8fffb1d.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 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 0xb6d072d4332ecb3882446e17713178a1ed5f6d57c31c662291d310ea7555af89. 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/BXSVC2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9452a62a69f0c7c2517db19d6e4672da33c2c2785a9f726d66a15b43935fc86. 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/BXSVC2200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9564b4591a6391813936281198c10ca0b9fccaaa66288987cad8060d32726. 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/BXSVC2200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d072d4332ecb3882446e17713178a1ed5f6d57c31c662291d310ea7555af89. 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/BXSVC2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e551774eff8a25259326cba3f822384ea5713c7e0f99079c51366b98c9e5a6. 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/BRDPA0500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84c9176ca5815619c40b59db8d6a44575088aad5e8757eb57d2fd40b17c3cf4. 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/BRDPA0900625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531a3ffde76f0643073c26cb08bc3d696770e0fde01771fad1754253ac3204c7. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BRDPA0500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a466879a7554f8b41fd09053da9a9a2ccacc9d8c34e0a8ef0fad666a9969c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRDPA0500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02a6725959db506f99ad9dc5dacbd0b0256db3c622c2cec36d45a62932da281. 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/BRDPA0500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511e4ce6bb1338b41c5a85474f40f0ada61867f80b50119993bfa0d236d5a48d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BRDPA0500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f9bfced3fadcd6ffdd10160cbb2e3e0d1a3188af87e3c88f7d57a4fb0a669d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRDPA0500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf3e5d0c27edc770a989bf1363e39275091b364a876546c35b5a3bb1d87ae04. 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/BRDPA0500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a71a18dd3b0a849d11f83febf5d3534246ce0011bd33df6e7a78f56f913329. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRDPA0500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0162e597d67b2f1eff61823e37e74b3a0cbd2d43375a66138abe32496ae350. 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/BRDPA0500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74287261b7e72231f41fe2c1f0f54fd314e575289ac30194bb5edb781cb0a6b. 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/BRDPA0500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444e390777ded3d212618e9474af0527951096d27970769f1168a29645e21625. 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/BRDPA0500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d656fb0270d0fd5b1c6fc92b0da37d3afad05aa7a2056e98430202949c572c2. 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/BRDPA0500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a1d1833beb9fca29afc8bd2e00709de4a42f9718f607864a9852b9012fa396. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BXGTT1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba79b5f335288bc5965ed8e599b193e35ed6b64ff768bc606e1f79136a36d78e. 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/BXGTT1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864caf74eba5c63760812386bc4489fa4b8d295eb83a6a54754b2edab2c713fb. 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/BXGTT1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577806f462ef95f3e68fe1f5e0f93455b5659c53c01fc7069463b358f9e5b067. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BXGTT1500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee591c827a9e5b50bb6427ff15d19be6eebd1f84ee47d066e6387ff891126c1. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/BXGTT1500029.