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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc6b55bb2c7d7d55fcd7b976d99f8eb33566e6eecf3d6615880a450a4ebcacf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4c1a10d-a209-4e23-a35b-2ec8ed71f24f.json and https://artists.proofprofile.net/proofs/artist/f4c1a10d-a209-4e23-a35b-2ec8ed71f24f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820fcf6e17d1b673be8bb16e736ea5a8c4b430dda8dc9b505fccc64e08f2073d. 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/ARF412100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcbd4d4e33d8f82e928405ead2bc1aead81d56c1aff6eaa61ad68ee930f3d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF412200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a89d2f4a2381210a547b0d099fd75167f3fc6701446692beb16d6f8b4ac16b6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF412100282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a636238f3eed68a22fb553a9bc7ddb718db9ee0834e876fd8fc45e41241a87f. 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/ARF412000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5fa6488fbec7adf7f6e5d49acda66c30d75cb06e73121b0e3a213ab2b59a70. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF412300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4525af456fd55ed7f95cffd7545e97cb5c570851463be899f14460cc8c9c45. 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/ARF410600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a636238f3eed68a22fb553a9bc7ddb718db9ee0834e876fd8fc45e41241a87f. 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/ARF412000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b900a4c4abd1dc290aa74603afa6c73d0903684d450037d8c35bf59e029c81. 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/ARF410800490.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 19
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6a9cdbd3272b78b5421a8b3ea31ae9fb7772077712ced2d95e9c55df3422eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF412100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4525af456fd55ed7f95cffd7545e97cb5c570851463be899f14460cc8c9c45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF410600527.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820fcf6e17d1b673be8bb16e736ea5a8c4b430dda8dc9b505fccc64e08f2073d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:03:31Z), 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/ARF412100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a89d2f4a2381210a547b0d099fd75167f3fc6701446692beb16d6f8b4ac16b6. 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/ARF412100282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4525af456fd55ed7f95cffd7545e97cb5c570851463be899f14460cc8c9c45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARF410600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5fa6488fbec7adf7f6e5d49acda66c30d75cb06e73121b0e3a213ab2b59a70. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARF412300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcbd4d4e33d8f82e928405ead2bc1aead81d56c1aff6eaa61ad68ee930f3d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF412200394.