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 0xa44136ae13c1ec83e2fc1cdc80957e12a80074ec82039049f38aa1653f59209c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7f9ed72-fc90-42d4-b55f-985fdd0649e0.json and https://artists.proofprofile.net/proofs/artist/a7f9ed72-fc90-42d4-b55f-985fdd0649e0.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 0x3c1b87a3d2f0465dbcf19b9299f3fbd50c62c78b9b2a8e7ca594f52d3a75e681. 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/FRX282426226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f7cd3354b338633baead9d88cfca78f637cb29921175a06361b36d79e89635. 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/DGA0Q2385626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eac242b4940591aed62e09487640befd0dc126628bef86125112ce90508d617. 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/HKG732384620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db06a1148f80a70de526fa243730b9919a808cfe0554f83269c78c3f851989c. 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/HKG732381671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac35aabb6b55341c90b766b565b2c62bd9bac5626b3025e2a0cd352cb22992ab. 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/DGA082342706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d7e0e9fbac5e2c54d9eddf9074b93329f09011256e10ecd68aa98ba48510f6. 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/FR96X2347906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13103f1d7336f5a8e279379a10393cf77fd6bfa376671fd20e4e63605189e56b. 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/HKG732300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d74044bbfa19ea57af019258d07b4ee881ec3e834638e1aea6c6ccd05ef45f6. 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/HKG732300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98b10d3b8c212380c665e258571a90b53842b2caf1d233e2530259efbbb51dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732246131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6bc42708b6225c049aa844034996bf0c3d6cd6cf093a2c1d66e2b7eb99df94. 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/FR96X2292308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787082369bf8dc7839f9e9addbb01253f39997755d44f1eb9fe7a86047b429b1. 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/DGA0L2378743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf3f537995b98ede296e02aca60b48d71648a637a8a47ac1e675eaa20a197b7. 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/HKG732229269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0570a4e2161571644eaf9b9cbaa89af08131d7523a056f73a8be8c471127e21. 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/DGA0L2367662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cf54a4fe599ddcdfcdf6b93cdf9a346f72c4883b4829ff03c924fffba44ac5. 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/HKG731796924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757f5206ee97951317b5627c9b810d25a372385f5a2bd3105b181be9160615c8. 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/HKG731796926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d615fa9177ddfdd3d6d5758afcd6149469c9e854e613d4bbd5c8e6fdbfb0c4. 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/HKG731858127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c52df4879c03b0287692712c9919698b12172f37f4c5a2a48e9aff278790dc6. 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/HKG732145145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4254aeb90224e7d10135d96f6be0804624742ee3e0a2c580f958b0a41288a. 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/DGA052316402.