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 0xe990b976b60dbbf220028ff2416f382fe00fdbdd4f81b3a6bdcfe61feba58566. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/232d37f8-eb3e-46bd-ba3b-b310cc053cbe.json and https://artists.proofprofile.net/proofs/artist/232d37f8-eb3e-46bd-ba3b-b310cc053cbe.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 0xff71303e70dbfe0e596484868f307dab651ff730339c847c28be6264026dd77e. 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/QZNJX2319553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef05eb20cfaa2b6f671190c5c8d51e14d8845b7c1bdadf93c5d63e4ba524e7a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJX2319555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850dbad5ba14c994212e92b0bd03bf9a838c7afe8c280419e7f2a959db746bd0. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QT3F42447918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a17b184da089738a8b4a32aadcf8cd43c2f297f7203bfd732427489dd823698. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYX2520029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13174821ee51ca2df1e9178ae88cb851d23d635219489633f9ca3edb448ac14. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:28Z), 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/QT3F42450819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55519cf0496eb6eb7b5f4b30986f80ae2c061f57e5a94c71e96fa784d4143d82. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QT3F42450851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638b802ccce131d290f89e539addd5b9307798988afb6e380d7e6c17d78abe9e. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:51:39Z), 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/QZFYX2520031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77ae59e4fa7f51127a985314d207557e8a747249d2c4731fe39a24efc8a70b7. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZFYY2529617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90902f566ddf384bf85b399ae24b5b3cdbf7ba4305b9a319cb8e065748d44a35. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZFYY2527707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df314178d1e507fb60230acabcb69a0c432888f040584a38df23ca92e27eba0. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QT3F42445155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb872792d93ae5dcd59976b2a17db11af851889484b5a97626e39a459afda87. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QT3F42452995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9f32722e5e8dff278fc4c6064d100e252a204d64702388f24fd29bfa31661a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYY2592843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4709688c0e0685824ba406a62959729e2ccc82f9a11b0f8828a10bbbf384ae38. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT3F42452997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee9410df31a8a34b92c81f85417d41d9c0a0f34502591d6e7601a955e8b00f. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QT3F42456543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe948d3ec046e4cc69ce3e17cb4eaa8f48e37e342b5072a3167d1655d110299. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ42566509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb52f3064d6fac2c325effc6fbb1ad103e9dc8e67cdf6aebb08880541b8deb3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ32559427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554fc18fe93b12dc3eef52df2693b0dd6149c63a9727cca6c311ca5fa808115d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES72535973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1340c6c9abb8cff3134d8b95a7e9cc1dc8d76b84094d04b4c822f4af7d0f0af. 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/QZK6M2532341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108cde01ac1f816fe54163046b7a0c4eada7ed3cef2762b6fddcdc36fb4e5af9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6J2515671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa371621dedfe5cd128bc059a915d772080781e04ae15319fee169e3ca316492. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:17Z), 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/QZK6G2589521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2755a991ea0357c7a3bded5328a5cd44fefae686b54ab5f805b3087abd03b80d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2508782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bd1f4a4b3c1324250d2bb563a6065abce9cc8a9bbff9c4968e4ac156c35b40. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWR2598677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4af3c4335892d427cda9868aca4a24f76e9112277cd0068c4150803df564ae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:04Z), 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/QZNWW2597232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3b51885cc03770c6266bcc9a020d58a6ec4a5279b789e244b2551494b3bcd. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZZ7K2537532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4791ac41d11e09cd90fb8e1762247a8b313eb3db23953f837f047b76fd56d340. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3EY2530312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce35c1598880546c87a0790a205ab7c27cb8245f7a294b2ead964d384f16ba7e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3EZ2547861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff107a9919f47da80799da0703f71a2d4aaf8c65c49a3893699a2d58c59bebb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT3F52544254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e0a27951820a4ea5acfb7a1daf12a9ead28a4fba94120847779534267a10ca. 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/QT3F92509710.