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 0x44363eed10d4ea56d6bd015524a1d98ee96dcfed39759c6c581cd7c0de476b33. 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/39e06232-7010-459a-9882-bca5bb20f657.json and https://artists.proofprofile.net/proofs/artist/39e06232-7010-459a-9882-bca5bb20f657.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 0x23cba9ed4ab3808c37ce9c91120d1a6fb313957babb8264ec1056ceb3854b6df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARF109901362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb53216ea8e6281fb0fdfe06719716e6f8e52d9a44b612d6f2a19e8623b7ed5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:28Z), 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/ARF109901421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6750285e95fd979215d25eca436cce174e7739f6d60a6116c6cfbbe38249993b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ARG991023736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484159e491f4d34fafe9a3f56bb0ad8c2697587b36fed36eb444dbcfefca65c5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ES71G1608999.
Folclore - La Colección - Antonio Tarrago Ros
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3cd3b3e1dcd43ce726de53ea046184de452e89aed57d4cad64e5e75751bf98. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6MZ1436536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1308b69e4a36eb69f5e1c742c19e7d983683453cc133c08af74ba7fd3c4d364. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6MZ1436540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126796dad62ec92145ac49262d5856d9318e99444eeb4520810b6c34c4139692. 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/QM6N21500757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d23c0f2ad42411772cd77b0c8033fed7c72eb422b53f985ab727d8d61bb1806. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:25Z), 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/QM6N21500759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e2d13002c3cd460e08c57b59d18a3fc9210b1f9721774f6b7c68dd2c27f774. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRVR11100741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eb02a19da6ffad7ffd879e4332497d2922e3f9f20a06c489c094dcaac79291. 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/BRVR11100744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c66d106474003fee0a54c994ff9184814f4986a77804d83e3972a4a11e1349a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QM6MZ1454318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950cb49c2646cfc2214ed7eab45fdb63dd13dd5af949d2f06483d4823e23f5b6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:43:26Z), 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/BRUSA1701592.
Memoria de chamame / Tarragó Ros Vol.8 (Coleccion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491543416c73532ae0df4dfa45320d98b3c5d1e04edba2525d63ff96a9b8386a. 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/ARF098200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf29f06617e1014747d700d5eaed74ba20514b8008207af0047f0164ec2022dd. 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/ARG991025302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe18e1da407fcf8f92e856d1d5e26d09c311808d433cefd96bc7a9b53ee6c6. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/US3DF2029546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e023da82401eb982a2e2ef84953ba43284369b35e8c796690d5fd8f7293235. 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/ARF390900735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491543416c73532ae0df4dfa45320d98b3c5d1e04edba2525d63ff96a9b8386a. 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/ARF098200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be261a4c8f9d51c697692f8a2fbb4d13d176e0fb0ee24a78e1a1dc5549b3b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEI1915737.
Las canciones más lindas del mundo, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f85a44c2a2b413ae273f99891e50a5c9d123332916002a1cfa836134e7c000b. 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/ARZ022500130.
El Toro/El Petiso Maceta/Galleta Collera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb8fb84e6df6b0c741f54d145efb65df8c68ba6290aa70694fbd5498370aa10. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAEI1915905.
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