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 0xd6dee859a3b6d5da3fc4f9eb2fe2de111fd3921386f9aa552c8140845ea0d3d4. 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/93e35f05-b94d-4f5f-9ca4-b59480fb0108.json and https://artists.proofprofile.net/proofs/artist/93e35f05-b94d-4f5f-9ca4-b59480fb0108.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 0xe71cae57242adf78e721c43785e6546dcc5976556c0ef62440afea4e3000f66a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CACWV2386784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f72eb3ba46b19b8f0ba1e71a7bf731b4351c5af310e7d6e43bfde9aa37cbb5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CACWV2386789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cb0fe2238654c28f0c7309881b0c6ab6727d8fa57e267f227eaa76f89425a7. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/CACWV2386790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50533576ee986ed275867de5a5813cfcd0b3f1c7bbacd81f6a7fc2f4132b4fc3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CACWV2386815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363470c58b8cf449c49a51c66c20d7c9fd808336883f46ae1bade258fe874c39. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CACWV2386793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259d6abbf6895954ce4fa8f666afb0923900d98cab5b99c81b66a7236132a094. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAGOO2364674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84bf26003938d8de410e37f32bf6ee6a791f9894ecb1517c71c4d81cb8ffda3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FRD0K2405440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd7bd5d82d235459900e38e68f49607c95ada22a537989f357a558c47ef83a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRD0K2405450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259d6abbf6895954ce4fa8f666afb0923900d98cab5b99c81b66a7236132a094. 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/CAGOO2364674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039cc51ac2d611172b369540cd9764acf06866cb477a79f9c63d7d37659cabe4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FRD0K2405460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e8f69c8b820ceed801df0522a05b2f55a06e17d3ec186a6b867f237c3ce341. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FRD0K2405470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c127af1e2896eb8fdaddd04506d0d6b73638428566061c88bfee2414b2a1d5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FRD0K2405480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3b4f178df80d9d77e8b844c8c4d2e4be8fcc96672e878a402eb91c96d6202a. 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/FRD0K2500980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460d75f4064085c48f6df4437162bca84af053bd7581130a5ed6cd8db674f54. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FRD0K2501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da3ae69faefced973dd5375d42ec24209fff78732477360bc0113d2e7691409. 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/FRD0K2501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4447ee9a0a3c1fccbb1ef6b72383f3e8626e09c2b0399553857924025d2055c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRD0K2501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c544ab3878414d249fd0fb82bde0ad3d074a335684f93e36812e37237a89faa. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FRD0K2501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e058324de385c5dce5521e9e8ed0c8394204b4ef605d6260d949aa2783dd24d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRD0K2501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde5e30e4014b51c159fa49d0cc7d10dd748945a675181e9a09f8ec2a82a63c4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRD0K2501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585e2a8e727c20188e6897300c6df9ea3cf3db80913c11cd4903caf3af6b4556. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRD0K2501120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910956c9931512e022d2a006703691235262d852187872a89ec48b935c08b8f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRD0K2501130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460d75f4064085c48f6df4437162bca84af053bd7581130a5ed6cd8db674f54. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRD0K2501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3b4f178df80d9d77e8b844c8c4d2e4be8fcc96672e878a402eb91c96d6202a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FRD0K2500980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238821c725437aceb0035667b8124d730b9eaf0b643342fcf623e71ce70d8583. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRD0K2501150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762230c90cca9faa7b0d445364225f9ad587790d141e76c23f74e2afd672ab54. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FRD0K2501160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c8c32e188b208ae66b0587473188e60af279bdc0710f5e9adf2b3f53d3b76. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRD0K2502460.