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 0x228d2efa9e3003659395b1b81250469f9d0a258fb5785fabea7350795f133b0d. 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/c41d7dc8-838b-4c90-8fc9-712a944babc7.json and https://artists.proofprofile.net/proofs/artist/c41d7dc8-838b-4c90-8fc9-712a944babc7.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 0xef3fd40cb97222c354b01a03f0141989eaa7212907af07b2e9baa63eeb41ba24. 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/GBUM72200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047e02a285d7a7e986acb61a18c27c66dd7906f9dd0b4fca17e20f8990564f9a. 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/GBUM72200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685f70d468a58c49b3621b6d21b14dc7ea02739944fd1296ad51adc6cb8baa2. 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/GBUM72200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd44be093d4e3a1687097784fe5952cef329cf8984859c6e9529cf7a683b3b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBUM72200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87f368f70410b74a91cb4752454e5268eed7728b6edf78bd8c8785234050366. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GBUM72200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8321087631d9eabe2b46fe6928f1497454edcf410765e3b6277554287e2feb81. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GBUM72304034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e756b633b1f9c76a3da731ec3712fa5a348ddc4c7ff2f42609ab96809b66ca0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBUM72200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c42c74098a275cc68611d3e273134ed3edc75945a05e6603fc07d04dab63fe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBUM72305411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67187299f6283aca44a39efb0e4882b5899ca0e2d782e922e2f6fd042131c550. 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/GBUM72304035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b8221d1fe1120e028365b1622b87c46562045f764055b88739def4580ab8b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBUM72403173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75461b18a5eb0d96ac0a88b49b531a8064743f051d20a899256b7feb55d41d33. 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/GBUM72403175.
Waltz of the Flowers (From "The Nutcracker", Op. 71)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402c6a148ce30d6061264d79820a879d6d6773723a414b65c86fb22c82b8fcd5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUM72308182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2dc9fc6e7f002aeb40779b081104f8e012fd99a290d092c5d3101efc856758. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:30:26Z), 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/GBUM72405730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2618834fcb4d49e7683fb647f5ea9d36791c73e57cbbe13494ece8e6cd3e8125. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBUM72405718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa015f8c85f98860dc1ceb22da743ce4c1a863b242fb7c4009d0368284551fd1e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBUM72405682.