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 0xc9b531ce58fb27b5329f8f97a9cab6b16a80e9c829636092bfa26539f9d097cc. 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/e0e76654-c808-4f03-94d8-c80cc6eb1db7.json and https://artists.proofprofile.net/proofs/artist/e0e76654-c808-4f03-94d8-c80cc6eb1db7.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 0x15f3dde81027cd438e965ba749737a04e3c0640720da2e5d11d96aae018b5d09. 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/QZMEM2362960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdd4d80386270df22deda26293d386605a56c611871bd02fda6889df0de7681. 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/QZK6H2385054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c2ff7205675838b0f0d6a897d1feb4e95e525dd754a4e71f6e3f0714e30c76. 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/QZMEM2362961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b14cbd6c117d0435c005e8e6c47b5bd6c11f25e61f499e41aede7f32f6de575. 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/QZMEM2362962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f98c605263b7d9587033fbfc8e3681095279c2838b5c462ea0d1f028329e08. 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/QZMEM2362963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1255af90af0cbef9d56086442f2fb1728f4ad040c0c5a137b8cddf799aae940b. 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/QZMEM2362964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2876a2e41925ac9cb91999b2e209d47729f78fc0b52f4b64ae7807fe4dc203. 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/QZMEM2362965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4cbf2d98209c3f40c98eecb3cda19398ce942bbfdc013886c33ef9bb747045. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZMEM2362966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa543588ed4ee9c41f6b1ef991f2ea65d29e9ae1c731eba090555db2a1f500c8f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEM2362967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee3292e535e764f406859cb09bc33c936dda2c211ad00d99afbbb7ca015e990. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUMEV2411643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9657777b944ba8d03238eb28d5e9afaffa22e1d72c6d67b2c8bdd7109b9a0d79. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUMEV2442196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8cf0bfc3b6b055b770d3eaa144e94dbb012071a6514034a8899bb2e4e1c1c. 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/AUMEV2459227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9657777b944ba8d03238eb28d5e9afaffa22e1d72c6d67b2c8bdd7109b9a0d79. 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/AUMEV2442196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9934471047b4dd3a5c5443c4b97ce625e7817c7712084194ad42b239d4a6815. 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/AUMEV2428785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d4f210dfbbf34d28d9ed8218c261936ca71ffe44f21474f262b120d164d6f4. 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/AUMEV2459234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c928dd6eb2cd8ebc6ea3ed96b7fdbf5eeb3c83e73ee5e4767c7bc96251459. 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/AUMEV2459235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee3292e535e764f406859cb09bc33c936dda2c211ad00d99afbbb7ca015e990. 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/AUMEV2411643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7110165c989ecb9807d96243fadb9df0b18b07e8bf7901dd7f9b6fbd586211. 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/AUMEV2459237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b54f510bef88288fb83262ebeb0832396d6e372082d8690ec9d1b683140fe5. 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/AUMEV2459238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576702b6ff09ccc9c48e5262ddff32f426843b76f59be9b3ffdfb3a8463bd4f7. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/AUGBT2490127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979775f23c2196bc3c34d2a41574c95a8aa0cb7f6be5d4be4c9da38dc36fa5a6. 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/AUMEV2503822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576702b6ff09ccc9c48e5262ddff32f426843b76f59be9b3ffdfb3a8463bd4f7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUGBT2490127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01beb651ae4477e4acb957ce0c2bcbb97851cc15b4aeb7a43665e6ce7e641822. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/AUMEV2533447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979775f23c2196bc3c34d2a41574c95a8aa0cb7f6be5d4be4c9da38dc36fa5a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUMEV2503822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576702b6ff09ccc9c48e5262ddff32f426843b76f59be9b3ffdfb3a8463bd4f7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AUGBT2490127.
Revisited : The Beginning (Instrumentals)