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 0xdc3a59a4ccbe7fe2af2ea16c1244c85217b77a36aed042de7ec0a57209360618. 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/bc5c2c7a-a24d-4a19-a0d8-81a0512a4dcf.json and https://artists.proofprofile.net/proofs/artist/bc5c2c7a-a24d-4a19-a0d8-81a0512a4dcf.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 0x0f968348a51612043747147d028a5dd7ceff76ee117494ce78cbcf66d33d01c4. 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/QZ5FN2069717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae2313ea1f0bd37f63893bdf837eac63c32596206c19f8325465ea4f1fff890. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZ5FN2069719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9662dad30f6dec26eb348c727a08a81a1f5b248b0fd0b1a1ca29b10a8f1ee0ac. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZ5FN2069720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0d36e8a7e6b1619b89ad336b673544a17eb04f19053e0a2a030d9f5e663796. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZ5FN2069721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd1aa9255c9d2f8b57e58d8b4dd8b4e65c120e4bbd556872a223694c7fa9f0b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZ5FN2069724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50aa0b24a555bfc0e753c102886807c7892c78e64507aef4291037dcd625152. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBRKQ2132685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e5ecf8c41a588d6a093e028811ae13b713b6095dc38ab74e2e7b8f98c5d733. 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/GBRKQ2132695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e85f156016e226f72fc7ad5da6e46b256e5b4c1e501c3ff33ec04d46360b768. 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/GBRKQ2141189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e85f156016e226f72fc7ad5da6e46b256e5b4c1e501c3ff33ec04d46360b768. 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/GBRKQ2141189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07bdf6391eb68c273f53477ce2052225f2073edeba0cfe532a0cf15278337c2. 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/GBRKQ2132687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50aa0b24a555bfc0e753c102886807c7892c78e64507aef4291037dcd625152. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBRKQ2132685.
Vilca (Zebbler Encanti Experience Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f9d98ab3a13fdd579965f10ddebb9ef8de4abab9544378719bcb6248991db5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBWUL2168897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee291e164518086bc970c208fa4dcb40610250e57ecc8fa30cf5869a5fab854f. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBWUL2177152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5402a08d3409a97a2cb404178a2eab42baca4483fb274e76bb9b62e9fcb88fed. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GBWUL2177140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9e647949e86f532d37cad6b167af94cbb07ed0744e9e3110ec98252974518f. 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/QZTRX2239375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4772594179c9fe41b39b3ae24bc30e04f2b757648d01467faf8d203ad4e7b31. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTRX2320530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24466264a687582b816d2d4e03fb79d9d2b0ec3293a1d52bce250210da059f1. 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/QZTRX2394935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4772594179c9fe41b39b3ae24bc30e04f2b757648d01467faf8d203ad4e7b31. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZTRX2320530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4772594179c9fe41b39b3ae24bc30e04f2b757648d01467faf8d203ad4e7b31. 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/QZTRX2320530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbf40f09c6e18fd8dbd2c64c90c09bf39d9aabb64131c7e74a43e55f26630c5. 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/QZWDD2382021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24466264a687582b816d2d4e03fb79d9d2b0ec3293a1d52bce250210da059f1. 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/QZTRX2394935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8c6de090fde3fe036288ac047dd28cf613d93b1ddd13f7a9445712a238f7a6. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/QZTV32418866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83d4ac7afa136efeeb3f1f753569a3a49273727cc72cc2875f420bc810827d8. 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/QZWDE2416350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6e2628fcf9342b7508a6773e7aff25775b3559407ff3a266552205438a9bdc. 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/GBWUL2540595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb11c54cd6c62ba8ae12449e32029ce28fa89df739e92bc28437fb9a9976b0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBWUL2540597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec298d1d14896d381726590da4d269df99c148ba890140721d1f73d9cd1c0dc6. 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/USLZJ2212364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ea26cc4e2345bf6bca928724fe3d1062a859dd3f459c36588d77a19b3e508. 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/QZEWT2200048.