thumb|right|Ivan Bilibin's Alkonost The Alkonost is a legendary woman-headed bird in East Slavic folklore. Alkonost is more likely an individual character, as was noted in some legends about this bir
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 0x219c09b634870ce0175d5edd7c8d7e392030f842cf2b96b362cfd883c97eca2b. 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/a7eafc24-f9c4-4130-baeb-b0d79a681bef.json and https://artists.proofprofile.net/proofs/artist/a7eafc24-f9c4-4130-baeb-b0d79a681bef.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 0x2929bacdac1c3409048b974e888ebc7c9283583c8a7b56561a22720e2e9f34ca. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCACR1697211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f91e15a461d21e0670da9e687be77573a940c7d1d0278eac786b46e44a93e6. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TCACR1670863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3861b01023991f91775349e65a956b540fb4125587f557dd44b34f1d87803809. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:28Z), 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/QZ8LD1794502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7354451df91608aeac44bd229052e49e41238975b58fd1daf89ae0fbd61f326. 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/QM4DW1820923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34247c29ae5cb2dc814de2c68bb0e7ace8f89b0dac41df6f92a95fe3b7b1a3d1. 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/QMPKX1816243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425b738925444d9c909258e8501944f63d612b29ff5df6d035550e94e860385. 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/QZFYY1979468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de7a938a8f2593af5868ce3f40159e89109cd010c62c7b579b055ba567ad250. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAET2034601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bea9284ef4383a00fc805484726d832e60dfc43703e94d45d8c29c37a2cd46. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:59Z), 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/QZK6J2187122.
Songs of the Eternal Oak (Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b83c985a79e6c38ef229daa05e88d680a2ffde03034101daeeb1106c7e4345. 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/TCAIG2457011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07ca8370fbf7f4920128efed2b645d955f2b0f27e184cea82b8317df7ca3802. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:31:41Z), 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/TCAIO2405157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9d44503dc226ce164978387515ec649e4a88d41e96363bcbb6a5f5909863cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIO2405218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7bdc260f6ad8ff1eb4c26791a6e7067d202c003784c78bbfbef2dd46626719. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:23Z), 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/TCAIO2405312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b7ed80e55292fe643e0d566497faf4731ff77949ff31944862c9f320eef559. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:20Z), 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/TCAIO2405509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b386b7dd14688c2a84a7596effe75556baa00120f6fd9ea5a59845fee080f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIO2405691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11caa556a903b12c12219873558b227030d785ca4effb5253f914524974b437c. 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/TCAIP2405737.