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 0x058454fa5cdb8b86e406cb9ebe1ab58e500fc4038b5a2977770d534f1da63567. 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/ab2ee713-1cd3-4e5a-92a0-238749a2eb66.json and https://artists.proofprofile.net/proofs/artist/ab2ee713-1cd3-4e5a-92a0-238749a2eb66.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 0x51a95d1db969a5d85da2dd01697612dec57151546ec6f034d760fd0baadaf593. 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/ZALDB2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a95d1db969a5d85da2dd01697612dec57151546ec6f034d760fd0baadaf593. 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/ZALDB2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77697519999a79cbded48b3615b93bad768667fd9eb1511076b5c2456e0ac961. 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/ZALDB2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c23de7782127314d546843aac347556550a7efbf5997459394da53fcd37e4. 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/ZALDB2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c015af51bbcc96a1933a181f43bd7a0c4a919076421223a68f79d8e58a6321. 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/ZALDB2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d79569aae340ed460f733fb36d2f77df33034dbe28b5870affa6a5595b6422a. 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/ZALDB2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a51b565ca7f3f40b7be2f593e692c85730c9ba02052fdca145fb5336aad4cc7. 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/ZALDB2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0696d5021ed5a740d52be2bc942187c865c73023df160cad4a70036f51b65. 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/ZALDB2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7c59b4a5e90f0cb58b76a857d928b8946471f1d575bd7d9753fafea9c79bd4. 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/ZALDB2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412aba29f87fe837997f0fd0e3ee271065d40db331767cc0d54ad0a15caf52be. 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/ZALDB2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea16d31a31d802ba8e5b59fdd43f0d14e93997200a028f4a148b643aad0ae4. 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/ZANDU2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783ddc9e4cac7ad42426253eb829c83e8c66b6c16262d4942645f578eea03a61. 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/ZAC012301244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66baca9bf4721bb34f337e4f9aecab7358fe93d4aa4bb9407b824bc9b10ae74d. 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/ZANDU2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69517aa342c71e9cc058031ba1e441a88366516064208f02324fac6601b62327. 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/ZANDU2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ed25bc88cc089af2d8e016a97b20c6a834a6a612487486b838100efa6ef798. 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/ZAC012400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba8f0aba4ae5c84a78272f3a981083d10bf6337afc70eaa87c75ddf403e31e9. 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/ZAC012400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844a2cbd6d8eed3623b221d1675f66ff2b7bf7b3fcd478824098928d21fac5b4. 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/ZAB7A2100549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad3673a0de4127825068cb6fb44892b0c94b7322a1b77ff4edb36acec7cce97. 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/ZAB7A2100553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a8260af76e8a1cade222eab44802841df0e770fc9bcecf5666a05e412a70d6. 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/ZAC012300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cc2b33ee92c79212fdf4eb845b3ae8c3c74afa06ac6e4405ca5f9f0456a2e6. 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/ZAC012400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c32dfb269ee64506fb0e05cbaef1aed1897dcbb1bcde6fa6cafe81add310f7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52247573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88ae81210032dfd58f418066353edc4ae92e8ec4bd406722572d0c8ad261fbe. 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/ZAC012300981.