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 0x8ed7925f805ad964fa84b70c6bcc71abe8d5550f53f9aed03f554f733d6198d1. 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/a0463777-9841-49bd-b673-13b5f00c348c.json and https://artists.proofprofile.net/proofs/artist/a0463777-9841-49bd-b673-13b5f00c348c.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 0x99ea2ab152ba3f606ae7ecbd91732ee06742f8d14f861e22560e0589f1e36767. 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/TCADG1704221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8374aa1fdde9dd31c8fa7fe5a436ac76c7e990d3d36e41083b6bc4697fba094c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNW72401671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514fac719fdd80fb08fc8974319ed80700167baa0161d7431351c2dac47166ab. 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/TCADG1704224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8493ea6f3e5461c7dd315353483422532c70e3359d0ea66609035b3730f2c2db. 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/QZZ972373900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b16ac6ca745c57d0ce70a8bf998598e110b752008f64bf4f7296a005a8f435. 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/QZZ972343754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3dba9ffeb29e17ea920ded6c0dbee9b10a2a0ef16f83f4d3496c281558430. 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/QZZ972343758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3ad356b4b1b239e1d4c3e7d3c4d443801761c3f011cb74c096d48bc9004c0f. 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/QZK6P2157140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3d50d0293ab92892e56d0de446b7ce8b6991eae3077b60a996d2975b3f196. 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/QZK6P2125920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe742ed5719cd741d15a9c16a9a1e7350495760bba3617638c9573dc9d8457aa3. 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/QZK6P2157228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe988642d8393af0c4db7c62affe0f0c7e35f3793cce425ed3b51c52a7914d. 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/QZK6Q2196372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c607118306ba678d1da90e7ab5192e9574d2a37fa1e27687be0e7daf9ba646. 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/SE5752146972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77ab1043422ba8b48b095a43722d1c0f0b1c21a1ccdec345a3ec52da925a176. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE5752146973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47544b43776988d8ae5238d1aa5898b40283a91c6d23becb198b0ec4c1a02faf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:04:58Z), 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/SE5752146974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3a973e8e6a70bf3cdf610acef22ea9afc4aa82502b2262f72b84697b9c9ec. 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/SE5752146975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641bdc050b575503ab50714c003f696f339f268bb78d2a2aae6015c7ab63e490. 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/SE5752146976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250301df48d69b8ad91b8ded37db81df80f6d4f33d78e10a36889ad2eec88fc. 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/UYM121705005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3865a95b0d96926d93a87da026989ed35d9ff227a8907eb5c029ad5e207ace. 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/UYM121705006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119d315f362be297bcaee47bf1042470a568251ce8c92d17c6d8e0fd1f698b76. 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/TCADG1704220.
Oficios de la Pobla (Oficios de un Pobla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a9b9019669f042cb72198d84c920ca43681e833db76eea0e56218ac3adc39c. 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/QZNJZ2382402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a20ffbfb4ebf59a7fd1174589f1f1d9ef373b931165f843f9a39053a90d39. 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/UYM121705016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ddf81bae9652114dfce55b3bf1dbab217997de3f3998b622a78a5971b8eeb8. 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/UYM121702342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde472fe9941cabbec98cf6f7ce946557e8b4bd81379011a81e206c31610eb4. 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/UYM121702343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b754182a6ebb2b9b1f64616a19df46220712e42126fe51d1fbe88f12fb10c86. 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/UYM121702344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b807f932fe1b9c2eb12667d74971a1316500d7a84693307817e8b23baaa8f3. 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/QZXLZ2346987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c056e9ac8afee24a0f89ea3c0f8edbef3d3cc48becff558370a67e346cee140. 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/UYM121702215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415471e6a36a90791bdb622e71f99acf43420146f7717878fd6fb2464e92d502. 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/TCADF1798719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e55cd2410548383d34ef1f6b105e61ea1990518ce89e67d11aecbd9816734f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:10Z), 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/UYM121702219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13db2ddc350193bb97c9c6e2ab8b52d37972cf5af8710590f9ac62c485fdc122. 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/UYM121705050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2064cb629e9ea17bcad62d8596539a0e315bf1fcb2a0f0351b55df7d98e1e02. 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/UYM121705055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1a8e5a50bdb09f64af83fc85ee8a0a7d9e0776ea49aa1f5e3f85c54b62813d. 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/TCADF1798727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803d43b6e631d33b7c5e91b3ee53547a0ac62419055866def6ab340d37bc9f3. 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/TCADF1798711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b36de658f8effc982a32f005cd3a92740d42f787e92574f7a20485048c10b54. 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/TCADG1704219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751e4e0691b93f3adbb8c900f05da49aa9dbdf1583522fa85c9b82fc83b45664. 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/UYM121705061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d24ebbae6776fc64ec8b65e4d21887f966cee13ad0b0f9953416b0eb53d63. 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/QZZ972370472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4465d8aa16be3453e3f0950e5e1ca9c0b58f052d6689d1b36b58dfb3bae109. 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/QZYXP2300654.
Conexión de Barrios 5 - Amor al Arte - Lado a
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f09c143b83676e669e331251eb60466240675c5a306de0c9eee26f9df48e03. 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/QZNW72283552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3d50d0293ab92892e56d0de446b7ce8b6991eae3077b60a996d2975b3f196. 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/QZK6P2125920.