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 0xbfe9d3c4eb4b2bceb797d387a593c61ef146dda725e963682c37b60b7c454d74. 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/cf5a41dd-df16-45bc-b009-a9d4d712b317.json and https://artists.proofprofile.net/proofs/artist/cf5a41dd-df16-45bc-b009-a9d4d712b317.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 0x7400dfe94fe5e9961a7959f0ead0f6986bc859296be75ab1e280211f0572a047. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAGE2256819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a30f18b72f7a9ff3011a8470ef4da7961924b7197a1e457c4bb0f23754e90cc. 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/TCAGE2256851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86222e7ceadf8418afb0c80a49ac5a3f4f941d1acae69a1d1c98a6b6d62d0459. 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/NOQHD2203030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2e0280773bc97f2d600c3a097e6d5dfcc67eadab987c092f34f863c77c5022. 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/NOQHD2204040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266830543165fb6a86f42ece37e900a19a62c55d4963b7accc77d7d741aabb69. 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/NOQHD2303030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f41947a20c8938f717d235514f4e5d79c89451b03c3ba1793fb03d9b8a909b0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:48Z), 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/TCAIV2421624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1642557352717259bcd9407728f54a1b521c1d3172363be47e97771d86b1b57. 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/TCAIC2498717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc7debaf0c4a89e3764f7ed5ebe7fc0ab599acabf5f0f4de7f8812aebb83409. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCAID2441929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ebdcb604d571bac91e0bc16f0f66cd05a250f2def35c239de7a719eae669ed. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAIE2469393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac7f07a6730b2220568328b7da1e3e17d7fcc16fa1f728f687dcb321c7dad48. 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/TCAII2480528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e2f2b5ef1b0fe974af0a752a733be8a649860743d5a1434207fbbea96e3d1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIU2469826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c034ba48009356302546d56e38ebff8a9010765418bd53fa221999d0b618f7d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJE2425199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f1a286fdcd3b6ac512046fe2a874117ee499289aec29a09c71697d32b58f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAJG2541152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd830c9bf1d8635229ae738c3d0e9d450afb5e5d5922670450fce19d737023a57. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCAJI2589387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b2b5caede01a92480f3a9669415d7c1f0e23a1f40607634c1c32fc81c3ac1. 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/TCAJK2542195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd7fb4959c8afa5543f31f49c1b9876ee5a76f68d02b4e24d763f5adca0518b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:57Z), 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/TCAJL2565293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76c44aa772cdaae004024d5627d023a385ac4b2eb039ab23a76949aae5e72f7. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TCAJN2592825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a5c0037a6349970cb6dfc23ec485e2ef05f18d9befa90d34f34a29fd561cbd. 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/QZZ7U2555918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c6f83f7b8c8453bb1c35d25dad00eceeb0a3e07906b804e788f46a2af066cd. 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/QZP7F2100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecaf6a4fe12ef4d2a9370838b96284c0f964c3452371058faa0e5cefc4e13c9. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCAEQ2018616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116126f849aab4fbc9802e6675edf048598205155e4d3f358f763b5067de37e5. 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/QZHNC2304365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d7cd2ff3dcf8a047532a7b194dcf80ab91b491e40df8ac038c8a3b1d8e8511. 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/QZDA52557527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8f68643ed0028c0b4000b1f51e0fed820fcc264251553753d8bea6e1ba1b72. 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/QZZ782451449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270dfc599ac5abb62b253baea2f29ff75b1934839a141b2e65f433a16f51423f. 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/US38Y2427745.