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 0xf1225bcd2414753f8818fc30965210604cfae2877b2c240ac92bcd452262eb6b. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bc1e3d0-612e-4024-9ae9-275106cb495e.json and https://artists.proofprofile.net/proofs/artist/0bc1e3d0-612e-4024-9ae9-275106cb495e.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 0x5d1419bebb3f32ce73a57a9d8698cfcae34990a898070ee18f712e8c5e42ea9a. 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/GX3Q92413091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f735999fa9066529894222073d888eb80a32192a007fa5bbd6e51a678676d75. 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/GX3Q92413092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f89ee3846eafbe49d068abf8fc2a3ad1004c7f05b490dc722d1b6ecacad7199. 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/GX3Q92413093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fad0eb98dbd35180309ba450b7d9cb104c19cac699e96067c714887a165723. 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/GX3Q92413096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65c00cd69869aa4e66ea8bb2774f9493e1c3981d4f3f7b8ec3e3d6904a7cf72. 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/GX3Q92413097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4639af7d8f394f66048c1951f7863db165c19adfec8bda396f0b15b4175b28. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX3Q92413098.
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 0xbc0e8b44cdc2a59f35d2566403c87b384d81f113be277a313c96513e29dd2f9e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX3Q92413089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67d75f001202e94acc647c920f5178e13a71caec8fed356d1f75b78e5b632f6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GX3Q92413090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0b701f43c6f8d1df771c95ab4c3317c67c8e13b957ac3761be44f9a2b032d4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GX3Q92413094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b865d7fe3dde1aa97d3a58005bd39e40e0b436814435f90fcda977c395f97. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GX3Q92413095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10ad3088f6428f0e1ea142fe098753b75612f5e5a1577bd220832e02ce4858. 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/GX72H2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a853287b45eece8b3014fdf2b8e5d370de821cf50edb4847878e6419652f43d. 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/GB8KE2319927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefed6d43f8e0319e214ceff5111d69353197a774be4f795dc5724988a360068. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB8KE2319928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bae0bb0d22f50411a497334a778daae9a62be447e5dd145e0eb7b5235106d2. 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/GX72H2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f2ccf3692b9a6909ce64a18bbf62a3aec47209191e5c69ccac244ad90f9a01. 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/GBLFP2331361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e30d64e607205d8c7aa6a77b7d98b790453193084310f915c85744e303e43f. 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/GBLFP2331362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a58ce7eeae2fd40f9c492460684fb484bd290a42150875a80772902d1b672db. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLFP2331360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695dbaaa19868fb585b4ade41b9ce3d47d773aa2aa5488e8902b9f4f272528dc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBLFP2331363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d20bd5cdb274d79ca0add297a4a975d62c200921611966ea20ab668d53504f. 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/DGA072200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9e275b4b0251eb5c5871d5f170bd04fbecaa37ec0b2da18a309f0320aa0240. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA072200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50f7cc9eac4e508018b2254765cdbcdcc6bb3dea6da74c6d8eab6a3644be025. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DGA072200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabad71dbe1f4cca00ad6ab38288a4ccd1af2fa0cf3aead40b5c43ee8d7959dd8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA072200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa90ca405360c29e395fa11ab791ced91177bc0cea909cb341452bfb09c2681d. 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/GBLFP2512010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd09d6997af1229994626487df4b1692cdbc00add2c551872a9727443478cae0. 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/UKXN22440323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dc5a9a0f5d2613ea688ec236b20742a60a7b76caad79ef1a36b0d0176b4561. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKXN22464785.