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 0xc9701933c77f98ad34ea1a9b7a98a81077ee37a8756b38d37c43cd14b57c5b7c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc1b5a6e-8541-4d50-9543-d35e1d561c0e.json and https://artists.proofprofile.net/proofs/artist/fc1b5a6e-8541-4d50-9543-d35e1d561c0e.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 0xee4cb67e40aeaa8faaa1a750f8f004b4193ad6d942001c3be433dc9730d2c5ab. 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/GX3Q92518254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2fce19861c9536b74b4c250a69c501ba5f0be47ae2d4d08e70e9a0a6a06f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3Q92520809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bdb0f51828598537925bcea2e95d24ca3ba157aa0b9f75d243f4cde8f340b3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3Q92520788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df4a3d4643fb2f8bf04d75ebf5903a411d9acadc44efb278de7f7cdc52a06e. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GX3Q92574608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec9fd6ecb0fb424b4785d77daacb6e239b6b4e7f86d417f2aec7d14f4d55744. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX3Q92535447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569ec594e656eda0f07d63b71abf286500eb31163b904fed3fa5a9f24c2d85b6. 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/GBLFP2527567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d894ea9e90d77632936f5320d166bfd50916a23087d92012533d7b0e02a1b96. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:32Z), 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/GX53U2543231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30f91024ace29793e78c84744ed185a0c3958b8a87c706cdb8289bc3a1dbbb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:54Z), 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/GXH2J2517718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ef7d07e32fed386ea04d784d00844577473460a692bdf7348713127bec0b27. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXH2J2573736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13c9f1c90c3fca69c89f4df5f7a0e19a45e8a2f2fecdb99606e8062ce1b30f0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GXH2J2584324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668363883b0c05fcdaf61a4b6ada25fc307c35a4cb20038444c65c4375cfa8ff. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GXH2J2599085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc03ffcc77a402755c28f62978e02cc31600414348bf5ff84a04c46f6c1a6fe6. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:52Z), 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/GXHG92587068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724494e6e640671a9ca236e4e8f8bf15cbd60cb94008348eb74acbb7db3d96ae. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GXHG92560058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a818492921614802e0965b38f8180f97a92ee139e7b3f44856437400a8d6a35. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXHND2542856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f891d6db273f16c1ffa9596fead2a05a8cedee9b81ea46709a48abdc60e26. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:10:46Z), 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/GXHND2542908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46184a3910fe0efd02eb5643e55614287aaf3d2e06be5e5304a298e4e4270245. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX53U2658089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0f33310fa0c1551ec18671e5ba3c046a2abf2a1b9ed7a80715e590002c2c7c. 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/GXHUT2508890.