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 0x9747fe03056050066b12af7a791118082ea6c6caeca85582f6964f52de4727a2. 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/06828890-2d18-4601-ba49-f13bade1da02.json and https://artists.proofprofile.net/proofs/artist/06828890-2d18-4601-ba49-f13bade1da02.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 0x58ecd66d3fa94bcb3f69625ee8400e71817fa4660c3549be911da046513ba6fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARF412500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c87b121d6aa93160292e03e783a8f8978ebd6627300488b7e9911f13dd1ed8e. 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/ARF411200005.
Vintage Café: Lounge & Jazz Blends (Special Selection), Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5253dd147acf1649f88dc415ce8e73367f2444d07f00190bb38639e13da79. 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/ARF411001035.
Vintage Café Vol. 3 - Lounge & Jazz Blends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb899c5c70a4596d3c0560e0196f11fb6e764aa603efdfb7011338e5c5f04153. 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/ARF411000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c87b121d6aa93160292e03e783a8f8978ebd6627300488b7e9911f13dd1ed8e. 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/ARF411200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb899c5c70a4596d3c0560e0196f11fb6e764aa603efdfb7011338e5c5f04153. 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/ARF411000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b920876aed15436f58587281e2f7ffa465ea621b9c80dae76be1f84467ebcfc. 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/ARF411000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fce8c1d2151ca6fc6a25178360559db26d1e4f63f16da792358c863719ccd. 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/ARF412300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b3fb74d9af0416c38fb5e009516ca05be25139f530c08fa6102c25b8f246cb. 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/ARF412300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5253dd147acf1649f88dc415ce8e73367f2444d07f00190bb38639e13da79. 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/ARF411001035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c87b121d6aa93160292e03e783a8f8978ebd6627300488b7e9911f13dd1ed8e. 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/ARF411200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b920876aed15436f58587281e2f7ffa465ea621b9c80dae76be1f84467ebcfc. 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/ARF411000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb899c5c70a4596d3c0560e0196f11fb6e764aa603efdfb7011338e5c5f04153. 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/ARF411000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c87b121d6aa93160292e03e783a8f8978ebd6627300488b7e9911f13dd1ed8e. 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/ARF411200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f3fbbfb8179f9f076c6bcfe858a88a418f63b5a728f411f564ab675c8437f3. 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/ARF411300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852c38fb80182a3259890b661dc555987eec7a87531b3742d3bb45a7f0977e8c. 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/ARF411502246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5253dd147acf1649f88dc415ce8e73367f2444d07f00190bb38639e13da79. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ARF411001035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b920876aed15436f58587281e2f7ffa465ea621b9c80dae76be1f84467ebcfc. 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/ARF411000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4146e04d2e8a92013970f348c47852b9c544b4818dccf6fc9be24ad8e4890636. 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/ARF411200824.