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 0x081c1c2dc34f0c4db43e515a1dfd671bc2b1dcb059fa3e72383c121be78e41f1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8cf02fb-c489-4740-b22f-0786470af805.json and https://artists.proofprofile.net/proofs/artist/a8cf02fb-c489-4740-b22f-0786470af805.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 0x7d0ee884616af212f96795fa0db978c636c3b60b08e22782d506b857e66a7d57. 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/HKD252200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb658e0f8f7a905955ac11ed7225ede6eb57a2517e724b0a6d749b887a5e4799. 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/HKD252200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e69b580e5ade0297923a975adcf5805fdc056b6379df58e7d2c3344b806b5ab. 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/HKD252200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d14aca4cf47ece37a9956a7d5f578c1e146d6c728100daa89338c1e5aef074e. 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/HKD252200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afa338b681e40e76ac3158b878ffba45aee1a0b393b3e860176d9f73dbcb055. 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/HKD252200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c3cece3263b78c52da4982d61f3bd942b373c0b3f42b5cfe4d1f8c4770c624. 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/HKD252200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fcf069c297f8c9f1103dd3d68716b8a0c7c44c2c88a24e61b47cfddd198234. 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/HKD252300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8a35abe4f39941452e6e0ed12a049c676adb18e2872b290722739ce96872cf. 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/HKD252300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dc26d2600b2836a4f2ba499b7cbe90c223ae19efb1018f02376b54e8f41766. 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/HKD252300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de9c19906ea3d6dbea0a6ba175795725efe1a1ddb95e1c364b8742eec1b9617. 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/HKD252300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf1143bea3d9babc51f92a5b47c616df4d4ac16d33e698cbf1fecedabd78a6d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB52256814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330d0acaddea48377cb3da91f491d4c7b6312b9438eacc621fbd685cdae9448. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB52256813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ffcf5cb65cc040ae47ec214f351d17f408af0000a40f5b6c2f678ec88b0978. 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/QZTB52256812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfde0e4502a7ba901df8b32c17d0885c4814d4c3f14f004fcaf9c413e7cc897b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB52256811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a3df098c179204195ef9f8c861b850e5cfea68ee7c942b402f9b504d762725. 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/QZTB52256810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eff9bf85460c26d2d92d224c592336843247c2bef08cb23e32e7f1eb5fd0f10. 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/QZTB52256809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e1b4a51d04afe74ea0a216bffe15ff0c71a59a8e158a45557dc3ac67512b59. 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/QZTB52256808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7f209e51b4a4cd4467e037f1d9ac8c7d7021900307e14705da51d9ddc39140. 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/QZTB52256807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56b817a498675b938827e80a6cee0b74a77064f2bf976b17e1ab36d4292dd79. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB52256805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835e3c83757606c4431ef5fb27620548277cca0d38adebed9c787c22be883f4d. 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/QZK6N2292570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d140fdd4adafcd7a2e8107e3a46bfdbcc0e9dc38f453ebe9130308cb3a72173. 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/HKC992100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7714bec5d89b4329afc94c2fdfbe3d24417cc13c4635c0e55a7a8ae13e1c8bb0. 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/MOA0Y2200001.