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 0x631a8b876e16ede00e7925401c770e2da93599dc25c37da549b5cc404b05bd0d. 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/8a965b02-fd72-4997-8e8e-fad1fe5c670f.json and https://artists.proofprofile.net/proofs/artist/8a965b02-fd72-4997-8e8e-fad1fe5c670f.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 0xecbc6a48a6b0e35a8a37e9a1bd9a312178efc5faa4911819503ba213d8b3be86. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLX171700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb034d0e34d51ed41bd8f5e6fe9675266e745578282c491a659a4f2427fe786. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLX171700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0c44b068fcfd363fd7e16475f53b3957f18e11a60b62dc1057143b00877a92. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/PLX171700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a0d20b6b22e11a634d61932da67c88be5ace6a8212e780d3a6157bb70009c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLX171700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a98f65497faeca416eb43df258b61705b1229bd39ebab4abd4a2ba75d2601a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLX171700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac377a20dda44883c2c5ed5e07700c16f14556aee12780805e4f5e6e5caec58. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLX171700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b62c23b28e047e065cc07645a6f3a2ea3b98debdec5bd10456d2cd046bcad46. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLX171700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb597c4d391cb6807743f6a462d979f38b343a198281cca41d0ad23cf2fc5f705. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/PLX171700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43d9a785a5f98356651cebcc3eb45d8fbaec751c9728568d046dd3fd0777cc9. 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/PLX171700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09db0721e7072a6742252d0c7fde08c490a4b505eee476308f04325ef75ad76e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLX171700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ee10f664f305226158af4cfd7500493e440b7a026e5ee3829aad699e894713. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLX171700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5c9e2027a1cc26678805db8ee1d58e167389c08fc4240e4e2a3dd728738c55. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLX171700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd626e17836ac25732305dee39130e96a6f922fad8c5b3a7e8bd141c5ece742fe. 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/PLX171700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd4c82fc3c258a98215d2ae5e821a41f5527973cf91ecf740dda2a1cf3dd699. 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/PLX171700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fc5a4decb281d53d4c113d18547990ffe8a6a77370d690c9b99136711c1955. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/PLX171700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ede640d570b4886274b1e3b4743e93e15c94aee005c9c68fafe628796e60f2. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/PLX171700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5896154193b1be90c92a998da3c03e64bfe97cbb403b7dd14e0bb59e974e658e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/PLX171700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f4f15769e457cf5ae04a92c7b6cb7953ada01f7acf6dc82ec418e7904a7057. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/PLX171700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535dec60ed8c51f754631aba08cdbe039a012a058f65973ece6ac7c1b0dd4cec. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/PLX171700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b63987b4c9f2e202963f88e8db614c2440e13313d5592fc93d341331f62f5b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/PLX171700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc0309559d29434ce3264ed75f1665448947a065df6fd6e116e5078f7d8c02. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/PLX171700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67bf8c14040576476cae25c0db73d41b9e303df3dca7dea8ed0da3c929c1665. 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/PLA391715407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9daa083d6148fa518bec096c3172497968a36b49153bee6e81111f10b43c83d. 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/PLA391605208.