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 0x277b19c9a2661c62dc60281b1e7505564e6e92bbb5aa434ffdd6afb731058ef9. 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/9e1ca6b8-061d-4aab-abd1-2424c4fb5867.json and https://artists.proofprofile.net/proofs/artist/9e1ca6b8-061d-4aab-abd1-2424c4fb5867.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 0x2c3bca597fec86792d4aebd0957da64013d723ac4e602a07c4619d168cb19ac7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:25:21Z), 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/QM24S1809196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c9e5c18e6856698916ab86c3d090255014faf076c5350c04e42c1c67cecc7. 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/QM2451810471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86e5358afaf7d13f2aac0c9ecf426b29de82eda21325569ecd03ce76bb1465. 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/QZERW1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d87741b071a91413a3a27591917ec957429769df77054f30aa639681320480. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZ9EV2102003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb43e611b1a7885394d4080a69ef1dfa23ca107b0d0edadc56fbbf707e771121. 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/QZ9EV2102004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6510cd284f3ef3b1e1e8f58e77c04723ddb63bf0d06c7dd110a01210fc8541. 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/QZ9EV2302057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca96d727218d8f8fcf9c01dae52ed91716638582bd921dcfc00fba1e52366c0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:32:25Z), 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/QZ9EV2302054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc15bc16bd98558ba5520da0e6eb00f3c15e104b78b0d2dc702fd13f8a593685. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZ9EV2302055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb43e611b1a7885394d4080a69ef1dfa23ca107b0d0edadc56fbbf707e771121. 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/QZ9EV2102004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6510cd284f3ef3b1e1e8f58e77c04723ddb63bf0d06c7dd110a01210fc8541. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZ9EV2302057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebd397c8db61f12a2c50791fffe7444cdbbe018a73c0d145408d1ff0b6c6541. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM24S2405520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f01c8d5514c91924171961cc861027b4f3486157b2f711f9862e72ddae747f. 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/QM24S2501897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebd397c8db61f12a2c50791fffe7444cdbbe018a73c0d145408d1ff0b6c6541. 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/QM24S2405520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257276c152a0cb991ff9161ab811e06d1b2c84942d95bbba8f3c9dc46934cecc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM24S2500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baa8c37e7c8e6eae23ba90891dd849777f1eaac70448a2340dc5d35c6b92cb6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM24S2406665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207b5368b11f6c5e23cc22c2190ab829594919eb1856c06fb29be653f4aaf8bd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:22Z), 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/QM24S2501896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eab4ba51f68f30ea18a2ab6755ec59de8f3a96d6063a4052281b14b3aa6886. 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/QM24S2403551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439cb724d2deb4899b7c2567ec28d34fb21d8211d70473cae6929f8cd948d8d4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM24S2501895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86d1a92bacd9da70f5a7999c57470f2e14245d431e9c90342796767fee0b510. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM24S2501894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ced1b6001e40e0a4413e880392da8f5a96ef48ddea207f66a1c4ba19a12417e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:30Z), 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/QM24S2501893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa424ca20d35b4bc3c1a818be1bf8cf4a0827b3892b96631f72909deef2b151. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM24S2501892.