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 0xf9ca41b0007337590d70c3cc74bb1842333451d9b4e8c93f17e34745048bd829. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84fc2514-d4cf-4b35-b325-b018b9059794.json and https://artists.proofprofile.net/proofs/artist/84fc2514-d4cf-4b35-b325-b018b9059794.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 0x78d89538e751cd1e7f81d9f292c124770637782835f50364373be03a4d03a2cc. 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/FR96X2476447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4070792b0cfc49a1e7b3df68d094037ff0c8eba9b46a1d3c3cb7fc31c10cf. 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/DGA0H2417640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bafd87faff3024541f604c9c99933bcacf22af63b9c979a33bfcee1d3466cc2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DGA092419747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c150738b1b01864e908836e089579b194d9b1f64ea53e79860d3427f90d4c. 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/ESA012405690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e29136a482638695ab0e7092cca89e11aee189e50f4dc96138f5813106b721. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FRX872410833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40de09d3af9138bc0a6cfe0b8952082fbd3a0e4c4ed4d394826be07d977e87eb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX872469307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a61a3a120467b82844b262f8aef6aa2591743a0a5a3c1dbb554372b71f0009e. 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/FRX282455116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b0cd6a823b228eaa642730ded8b3510596f4e5a4e618b14d7123cf6a0d8407. 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/FR96X2475735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc80d3821796163665f0c2b71affc60f8b4c76c3705fc5a54580ab7d47071f3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR96X2438542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9384ad13e913baf85d4f1d534576fe5cb1b3e3c8e7321015d628c7469ab6711b. 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/FR96X2413747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af8e2cf7d848c82dd0b58f7ff391856ae6a4eaccda5678f46dbec95d75bc5e. 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/FR2X42455421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090adb09c6751d05e9d4efed802197fa73d1b145a6ba8e784d5b3ec7e9694a79. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X42419226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7ea7c975598417d971444f237f47d0ee5f130d8b219388d55e439564a28a1f. 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/FR2X42424251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787f2d8f87dfb930d6fec3d28d3d335a0ed97df7f7b90de1f903773b962126b2. 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/FR10S2473633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456003ac02c6e3f9a3bc3b7af1b6970f5ed52f001e7fb37fe87a592c0defe6d9. 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/DGA0Q2327353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b6eada81e433e9a58ab502b5feea7765156ca66b0a5c6214dfc0a79e4ac6a7. 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/DGA0L2378871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859c22ab1258e5a4fffc8bf004bf127e093d318ffc2939f67d3413de10dd60d6. 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/DGA0P2354233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fbd6adcf7a754f53c5ff0f94690a69023cd285a6ea636a5883b7b5eaa67aef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0R2305123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09e228191d6632b5d40b0656bcdd5305a10a7149c3fcd852d52083dec61e590. 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/DGA0L2393057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f4c92a0e33667f79dc29d841c8a6aa2dba8d416a85dcd3f8f191ffed0ceea0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0L2320833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9541669823a1f8aafc2eeb7b49cdc2f76e689cd261b4a093c770f3afece72. 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/DGA0H2314579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ea05a5ec45611f7314a2315dec138edea373b9f638b98a1fd506ddb85f9bfd. 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/DGA0Q2425305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58eb3192364228406e76378c1ac34feb3ab7d8aad765ec8803e60a38b1c398f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA0Q2403960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d5f53eee8f2780500fbcb5405ca79bca6b2004a1fa752d03829aba655b75c4. 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/DGA0P2462984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ff1bb056bc916b479a6672832276ecfdf23e234c63580b10b3650e37c0ad6. 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/DGA0L2427146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedef466aa7d62c41d4d831dcd4adcbe3b30921f701e7dd16a91b362db573a907. 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/FR59R2395549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c43a0577a3c6d77ec663c965293871be55399629a6d1dcbd632280cd583830. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR59R2395548.
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