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 0xebd3125f5ce975528c9dd423c742950d98441cc4caf6b8c9684a297aa2fa1619. 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/68d6860f-39ed-4b70-bf25-ca3d4e3123e9.json and https://artists.proofprofile.net/proofs/artist/68d6860f-39ed-4b70-bf25-ca3d4e3123e9.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 0x1b0d56447a2ff6fa421b2d83d72bc062b0af6e3a55fef77084c3cbc8aabe044f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHL2337099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9f51a0bbc4b505725279d57db4a1357b4f053732876cb2d92da5701dcec385. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHL2386658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b958bf8ffff9d28aef4e46d4827dae8a85f6c0558a1596685e8dffc7dd57a53. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHM2303557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88db1b012d5a625504ba386d5ae2d2b8214cfec7778d4dbb5a54dbf29198ab2f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHM2313863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd519124bee91ccc35d68c82c2213121651d805a2a7adadf66a4d8d09532b0f2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHM2313870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189efed559e78d44589d7ef40fac946771075205903b4564c1939521e098892e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAHM2313872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720afb405fb16dd7f122ccd879d9c379cd83a511212721c80f5f4a3acca818e4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHM2313874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa088de8ff96e285c521222b11a5dd95bd6ca75cb99d5e9548bc3f4e2a4adfa59. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHM2313879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a434a73a88787df9a11b326015b7d6c72d4adb9d3dbe97068b520b5839afbac. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHM2371316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a020b9086c586ed54539d8464bc0b38fb4983e849512b9ddfde89277d1c22ae. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHN2346875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a12ce5e44b7eee47ac8d2709fdb41fed045c876f28033845206911dabde6e4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHN2346891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844dadef4eedb23240e7e7583c3278fdc2468a9350b318cdac42eb076a9ce02b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAHN2346895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8286abc440ecad8a35c772879237d9b00e3080cfa9a7d20a5b460e0c7c0c38. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAHN2346905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee5df5a059a17cc5a794a5e8e8b18e74a049bc581575356473cc87c467d453d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHU2432905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd317e00bc59641e6543e31d5ff76318156eef75678888aff18371348eeea4d47. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAHU2493533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc32f43c24af2531b9d562bb7b5722210362916d9f44f0b1d879c7b87261e99. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAHU2493539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca2eac18351e05b39c2d3abd4d311a6ad24638ac59c233a72e18ad6031a6a4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHU2493543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78ced0d74c6e4b6d63b812c628e885adbc7fcce7d7af8ce29d4ef50b88c0f9d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAHU2493546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb18ac8b8a2469beac561c8d65aec16d2b40501c5d7fc5f7920f942175fb1e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAHU2493549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ead34bad52b25aee6765680fadbc4d767a8f8eae5e628a204d11fc9b3316bd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHX2407025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbb8d82bcee59f81ad4343c2c0302a9470772fd465d8b8e9169b6cd01de76e6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHX2407027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed562608e4a4b22669ccc201b10df11b39933e7d958e1ac7a2aa6932dd7249a5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHX2407032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e1b0b5a77e5da1951fe8470dd67369e115ed2bffe4168c605482c871a9044d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHX2407035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9576989a617eb1f67e41030a01d303b5fe23a30d0b8eb28f2cf9fea3833675. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHY2423151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786d8a068118e3527e8d0b628e12be9e803182b21ab3e565d3f5e4380bfeb0c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHY2423158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aed70df73c49268d9e7db155d020cdc0722ebf5ab44006337cfb969d87ee8b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAHY2423164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c52e3d0abc2cf5659d2568992758c879611c353be5c07da6cb19437ce85c516. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHY2423171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab4bee565d66525cf9cc7c5695549f7498b0df88f5bffe3d75bee55a1e92f70. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHY2423176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0565e913f69cf0940c1336d6da5d1f366dad3c9231a1cb981f393bc59200fc2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHY2423180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80aa4b7ca10023c20e4601fedb1e98b56c72b0d7176a229e82807aab31ba86. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHY2423187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c373376107465f97aebf859e79d3333bace2abddb15f23a3cba0bc56dd285f. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/TCAID2485170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb2d354803ce7f33721c474db8f5befa54d68644daf141f5e5bc16a8f958901. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIF2490103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00183b36ae068e8f1b97adc2af7ba3a17bad7a5ee052303ce640ea6e8f6ee1d6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIF2490107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf227c179881bdd74214c234c027349d9e328be777ec20b231e929a73ff177a0f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIF2490109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7435023e77cd3aa4e643d8255176316ac0198e37854917becb35dfad6083e53. 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/TCAIG2490112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3053ba7a3351d15004511469d6ea6ecfa2b9ddc45a9d2c6b51a1c8349370d683. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAIF2490114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d21e76d3a6b7d496339ce507798892ca122ce9c9423f42138ac8e66ab7bf8a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIF2490115.