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 0x74e12111231493163400dff57779a0674480fcd7ee171c00859f8124c745e814. 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/4d35e632-d3a4-4366-b398-24e7c0b01b3d.json and https://artists.proofprofile.net/proofs/artist/4d35e632-d3a4-4366-b398-24e7c0b01b3d.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 0x376a6c5570b96c6234d399a51a9a54d81e7502a82e6d4ce9fc5cf02151ac5fb0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/MX3741300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eb0968eabd780aa82a4a3c9779aeb42da8547a0d1e63dbd1e98f0411820ccf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/MX3741300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fcbf9524b0dd5fce0468bb3941d3928545115e3351288c94704bbf9f3f2440. 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/MX3741300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83fbf030fb00d90c89c70ea7e501069054ec9549a985d98b155617b8eee4f22. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/MX3741300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2308129b05e0f203b731a4090eb73149b100701bfc8ba33a9b30f1c2290c5f05. 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/MX3741300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1dde5902b562242ff6db6ea0b26301d6c9f5119ddfac3b2cc486591492637c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACN1677300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794feb196c2576d8f7407bfdd12345a25a8cd35a8e3eda3969c0fe04517cdf49. 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/TCACN1677302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38100e6b736b1fcaf5c3e15a5025ba62551130fd810849765ead775ab58a8f4. 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/TCACN1677303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0db3820e064203c53731b602f266850a265a77e9b6f03f1521fc684db33c563. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCACN1677304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4843583bd824cea033b4da7cc365afcfdd78478558710460c90d9f14de6bca. 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/TCACN1677305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb360bd631e97db8556ba8b2de935b1dc0c9abbe20337283e9ac161f0a8785. 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/TCACN1677306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcd545f230485701858a2a72bb659ccb3e096c368cc74194bf2db44618354e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCACN1677307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2f86514e53605e615a1b138510fc700f4eac3399acaecb19c3d491c5ed5e21. 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/TCACN1677309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252f9d89e3dcd8c7c8decb2572a88d32b1d67c5c1209d14aed75955d6040ad9e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCACN1677310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba688129aab75657422f5c3acd43f4c16b1d1cd29bb7a1bb9c02ad24492f62e2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCACN1677312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d146e6b17ec3b33784c196293b23b8c01db92af903be973ad5ede30ed1ee7a2. 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/TCACN1677315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b693ec1537715227b89b3e5920c2091614593f979378d85b61dc16969aaff8b. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCACN1677317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26da4d13e3d2ef935ae80630a913b2904d324b70b6a8dd832b2ad3aa1ceaf19. 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/TCACN1677318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed1976425378bc1c212ee17fc9bfd7f58f38b16322c3859ed08d62b827fb729. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHZ42029728.
Naco Es Chido - la Verdadera Historia de Botellita de Jerez-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eb43f070482054137d66e7e70cf0250922867d26f7c1fe5d8414b5f196f858. 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/MXF601201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7661b6781c457f701d83dbf379b1e28b076d692b2aaad7b9dddbb6317d54c44. 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/DEUD91668368.