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 0x5b7ba7764c0ef5fbdf2d77e84d85fa196508b590a326d79dc1f20d4099197041. 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/3ed4b95f-8849-4b25-ab97-c05790a73002.json and https://artists.proofprofile.net/proofs/artist/3ed4b95f-8849-4b25-ab97-c05790a73002.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 0x1c0401c196067d6eb8f8dd8adc3432aa44096d90018c9335384588afef2191e0. 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/QMDA71552040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf577145c358e32a0ebb28f5640e5737eaf5a3a95c6cff7af004bed3c7e47041e. 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/QMDA71582840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52302d3488f9a73f077c22edfb043567a0cc6c0566a76693d8adf6ce5104d4a0. 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/QMDA71582841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427f94915e7d5001863634be575363effaf2ca3fb55705db1c7034d3f401c3d. 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/QMDA71582842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc58d27d5eb64a5dc29c4a4a908124f6969c93cf9607323ab183ef62b3442b6f. 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/QMDA71582843.
Pout-Pourri (Agarrada Em Mim/Faz de Conta/Que Pena/Memórias/Memórias de uma Paixão)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a321ccfe59afdb06c02f1c1f671c49d66d96a61bdc758da2e67a93bd5ae0e2. 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/QMDA71582844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e615d160cbd37bf77e2b494c6367933b56d4a191ec7ca9da755e37a2e5f6e1. 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/QMDA71582845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53ef2531fdb73d0943444c48abd4a335a31c2d39a97dbd5828821b6d56e682f. 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/QMDA71582846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13dd705cdc2d132003c87b3edf82818bb931bc5e881266bb1cef2e9299321a5. 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/QMDA71582847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda145eaad6ff57a08a710dbba7884df881b3172c2894ff88dff237f69f11591e. 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/QMDA71582848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7220fc6c2ac5ce8b2aa135520e12fde13a0b3bb21d75e1f63d58f594f8f079. 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/QMDA71582849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c28fb2fc926ac067775b3e1e681ac8383782640709a4b8cd0119488b2fee60. 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/QMDA71582851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade655d4ec8d95415d01f9f4541668391a571b8643cded39bbd75c6095aa34a. 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/AUMEV2482246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647e7926808e828cae777d5858dec6e92a63d782266c008d1b3bdedb87f720cc. 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/QZGLS2393029.