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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6124fe662ea4c857ec37a1bd480c605421807e05cf84a4b5ce923b536b3d346c. 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/6926bab7-b971-4803-8f6c-bb67b9775e7c.json and https://artists.proofprofile.net/proofs/artist/6926bab7-b971-4803-8f6c-bb67b9775e7c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c83b854aaaba91ee92d2088fcb9c41adaa3b500a8f7f39e891d9231be7416e1. 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/TCJPK2080007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb426d9895a230c43eb12e909b4edae2e504c78303dfa8e61646edaea7ab77880. 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/TCJPM2067415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb426d9895a230c43eb12e909b4edae2e504c78303dfa8e61646edaea7ab77880. 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/TCJPM2067415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f732cc56b34b61b0d6cddea5127723aae050c4a2fd7a99cd0e07a72535595fb. 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/TCJPO2189350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb66ac84676ebc5422e70bf4b02a9fe36da998b7f8591b291f3f8447de801e6. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCJPR2277573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99eff63e5505a23faeb72af299261de2f33231f65edf73514340bb7397a710a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCJPR2277574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd779b5272cf042a9e77ea9c2100080e76f2494a2b4536c50c0fe4aa7d0e9cc58. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCJPR2277576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb66ac84676ebc5422e70bf4b02a9fe36da998b7f8591b291f3f8447de801e6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPR2277573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99eff63e5505a23faeb72af299261de2f33231f65edf73514340bb7397a710a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:05Z), 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/TCJPR2277574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd779b5272cf042a9e77ea9c2100080e76f2494a2b4536c50c0fe4aa7d0e9cc58. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPR2277576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b37f05ac60e6c4ed0122f7da000b702f730d93300fa3803fca5c31f4a6babec. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCJPS2237630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43b9dc8b6cfb0ed73a2be62886a6dd0d60f279632dccdb60566b5b88072c95d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:35:41Z), 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/TCJPA2452796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43b9dc8b6cfb0ed73a2be62886a6dd0d60f279632dccdb60566b5b88072c95d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:46:04Z), 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/TCJPA2452796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e660588b070b6ae115b8ec219f3ea461b8d1fa545cc45c08495c8b20b74cadb. 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/TCJPC2439904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab403ada8efaac5bda4e7af3999082cb0a976fea49c8d868da87be64afeee091. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/TCJPH2519000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2433bc19dc4932ad41326a3d12c8e07cf3fb22ea08e1780035842b407c6cd263. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCJPH2518990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef5d58be2aeeae9132a218aa722cb6cd924f6776ad5563576e3ac2d5158d3c. 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/TCJPS2244312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599f73f620884d0a82440278c4438e1b826a3534015c6d58a7765113682e7658. 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/TCJPS2243190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8610e9d82a4531b5ec0e435e7de6db835d7c2d1d55bb20448363a8bbdfcd2ce3. 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/QZMHN2490027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4495004f4392ff1c88021a280bea7c93e58d6dddb6a4d5ddb1ee3389b0cc1f. 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/TCJPK2088090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b97b08163d369203ca3964218189504228325ff7a2ebd54ece3bb2acd801b2d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:21Z), 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/TCJPV2390814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab890166a5d7e2ea1ba907e190a4805000bdf8858f076d5544d27cafcafde44. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPY2499552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5056c7ad666af92f0efd21b429f86fe63e682218355e0716c68049c4dcac2f9a. 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/CACWV1954274.
Arcaea Sound Collection: Memories of Myth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c32f2a5f1084f364b4818b6a308085c66dad820b46ce34b341242c050cdf37. 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/TCAHI2357303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba44e116a25eab90782c11761b7af4072c7fe04e6ba604404d2c424daf5ab5. 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/TCJPH1861049.