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 0x171f7ca22e1141e8f6a6072b2bb198b5c25fe626cc4deda9b25ae5763245ebe0. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9fbfb2e-8a7d-4171-a4af-b245a58a562c.json and https://artists.proofprofile.net/proofs/artist/c9fbfb2e-8a7d-4171-a4af-b245a58a562c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Golden Instrumentals, Vol. 17: The Beatles
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 0xa3e8b6252eda6881d8da11cdf74b9f06c744c340ca78008e28efadfb1b20df4d. 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/USR010910082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8bcf9311ef00c82562ea6663713ca2321802bffea9a524f98474da95d91416. 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/USR010910084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e866d98a4b75d659a9e878ecc92d560a82a4df3c5d952425cd41a0c6d96660. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USR010910090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cfea185fb80b1c439f3effa27875b6c2f7a7f0cbe987eb81c38744f6c94cc0. 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/USR010910092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5afc498195df910ba7fccd43c14003eaded321b88001d0cf55582f6b1b9934b. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USR010910083.
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 0x98560d9e0748ba781602aaa1a81a02cb5f6d1dad0a8c305b7ac16a03bde924c1. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USR010910085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09af200d131fb14d9b3a8472dbc17bedc3270b04420dc6bf0fdfb0882e6a79a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USR010910086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a360609927f885337ccf019e7f81df952e5eb462332a905bd8062d341ae6e75. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USR010910088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34022d32274073b63d5c2ea0c9a25466a076caee6b3a9a25d61966018490cb2d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USR010910089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b9e98b874d6ac43ec116b3cf03bcc340c48853ff688c07f6dd31a140bbbc14. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/USR010910091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8476d8fc725a7e9b28b7d603d6b4382d9eb3596aca7044ce5c542801f65488f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USR010910093.
Golden Instrumentals, Vol. 18: The Bee Gees
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55e86ab0c9e62b7710044f4869eed10ca425f94e6fa9d6712df77b94455a31e. 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/USR010910415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e75114cd4b6d35b900381346c62539202dc9f814c9daaa58ca3d897fcd265d. 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/USR010910418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211b42ed13add5f7757855f50d61bb8b3b2bc482f427a54abd1577c60734a233. 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/USR010910419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cac611b04c7093ce05e9f8434ec1caaf26b65f956db0586dbaadd53ae4dd10. 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/USR010910420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b3129741ef937a6ab7db50a17b8c087f99b9df28676f24c5f1102fb0821509. 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/USR010910421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50b218d287609bb1f56345a40e538772c73ab4bfad9117bc44fc5ddd4113c2d. 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/USR010910422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8481a2061439e28088ee9fd6f5a2622225f37d2d4ec9b636fdc15da3e4d3f22c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USR010910423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c35d8a92cdf396627bd49360227e28a56722797b72b1c6abfbff33cd2677c5. 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/USR010910424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00456139992a8970ccdac9788155760f04042c99c85bf5c74ad1e1ad5287b28e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USR010910425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffb35f4eb37bb9991dfb5891c1fa5f67344f5e3a81eaaeada81781deb771071. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USR010910417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a3935e70b9d50c60857f5e8b8212468dc170516ca7efa7b3bfc69ec2f0a97. 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/USR010910371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906883a1995bc3b5a86d174cef09fd8cd71b05abf3cd7cd2e74b9e03bf58679. 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/USR010910379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c8d7db4fd61cbe01bb5c920fad479b9c615b2aaf4412a4de11ce27e1dc706. 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/USR010910130.