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 0x1783a0879c04236696a5d246270c1d9e2a737698f7c65c978a26841634f5606f. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d83675b0-7cd3-4a97-8ab4-95939450c9f1.json and https://artists.proofprofile.net/proofs/artist/d83675b0-7cd3-4a97-8ab4-95939450c9f1.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 0x8a994129b4c656252ad99a256b1baa138e2537556e533ba60256b650b4af7573. 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/BXCU91900001.
Suíte Pros Anicete: I. Chorinho Pros Anicete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5dd1fdc18d77f6b6c1f9adc052bdae26ff6bd1e14d660d7b1b807740dd8931. 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/BXCU91900002.
Suíte Pros Anicete: II. Azul na Cartomante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d44ee870d81e622252ba2439d8fbb7764b04505e574cb9b83c5ebb293a8691c. 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/BXCU91900003.
Suíte Pros Anicete: III. Os Anicete Na Anatólia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae45daea40632aef1ddd22debc252f08ab1cd847155a22eb34af6f6616eae46. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXCU91900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609f8ea400ec7dc7f12c249ac0259b86445655a51cb036e7127e02b3418114db. 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/BXCU91900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83605f4cffb4065ee72839a1df97ca0e627b41b4f6b98c79c3e632c37cad3a1e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXCU91900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c2c9b1095797f8102d9140c026a5b0928c2e64d1b7ec48f564bedb6af1499. 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/BXCU91900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81f20a3b1757de41fd9f62af7c51e631fbe0b83d17c9065157a9d3c3eca1cdd. 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/BXCU91900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a54d1f5a8728b7e81d762319aadec81f428d53eb1e719dc3e8abed248f06c4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:56Z), 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/BXCU91900008.
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 0xd5513fe5cfa993cb24eda5d96f9ed5ac5c4eda1a894e5f2af3771cb31d1a4977. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BXCU91900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1a0c0028c557c8e96ee04e8dad22c81a6bbc17d2f38b31d9d0ce60402a7aa4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BXURD2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1a0c0028c557c8e96ee04e8dad22c81a6bbc17d2f38b31d9d0ce60402a7aa4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BXURD2100008.
A Bailarina e o Pintor - Parte II (Festejo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca54373604db249a7445d32afdf1f033c69372225866d658c8ad2a0817aaef. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BXURD2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1371ac9e86b114be11448ba248a63f06696d9b3382eb5f6836a9b2e2ea682807. 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/BRCDH2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077aadf86a8c5807e538a36aa54b70b7e8f41684bb0e7761d7a7a56c91838217. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRCDH2000001.